Recently there have been a lot of videos about ranks of nobility and such. Most of them are very bad as they simply do not understand how any of that actually worked. So here I will write a better version that is actually correct.
To begin with medieval nobility is military, all ranks of nobility are like military ranks, the higher the rank, the more authority one had. From Barons supervising a handful of knights, to Dukes and Kings commanding armies. Even modern royals spend plenty of time in actual military and always have military education. Even if public mostly knows thew as hand waiving smiling people, surrounded by luxury and such, many of these guys are actual war veterans. Back during Middle Ages all nobles and royals spent most of their time on the battlefield, fighting one or another war.
Just like in Marine Corps, where every marine is a rifleman, in nobility every peer is a knight and also a baron. That includes even King. That is why nobles or peers sometimes shortened to baron. Most knights however are not peers of nobles.
Knight
Knight is not just a rank of honour, like it is nowadays, but an actual type of soldier. Knights dominated medieval battlefields and because of that obtained plenty of political power as well. Medieval societies were government by the commanders and officers of knightly armies; they commanded societies just like they commanded knights on the battlefield, with exact the same hierarchy: more senior officers in the military were also more senior civil officials.
Each knight was a heavily armored cavalryman, who fought with wooden lance and heater shield when mounted, replacing lance with arming sword when on foot. Their armor was at least a full body chain mail and a helmet, though in late Middle Ages a wealthier knights could afford an even more elaborate plate armour. Such armor effectively protected a knight from near any pre-medieval and medieval weapons. Making pre-medieval infantry like lightly armored housecarls obsolete.
Knight's armor, that is rather impressive even for a modern person, was so revolutionary by medieval standards, it made it almost impossible to kill a knight. For the first time a soldier could have an armour so good, it offered complete protection for the entire body. This fact gave knights unparallel leverage over the society, that resulted in the whole governing structure consisting of knights and their officers. In fact, the entire Middle Ages period is defined by this reality. Middle Ages begun when knights defeated all other forms of military and established their domination over society. Middle Ages continued while knights maintained their martial supremacy. Finally Middle Ages ended when knights started consistently losing to other types of units, such as Swiss Pike Square. Gradually blacksmiths figured out how to design and make a weapon to specifically destroy knightly armour and make the knight itself vulnerable.
When it came to social status, knight stood in the middle between commoners and lords. Unlike their officers, baseline knights did not govern anything but still enjoyed level of respect and honour from the rest of the society. They had various special privileges and such.
Squire
Just like titles of nobility knighthood was de-facto hereditary, technically King could dismiss and appoint any rank of nobility but by convention, ranks always went to heirs and any exceptions were rare. Being a knight however had a one extra step to it, before one could be made a knight, one has to serve as a squire first. Armor, horse and other knightly equipment was very expensive by medieval standards, so lords were unwilling to bestow these things on just anyone. So, one had to first prove oneself as a squire, an assistant to the knight who would help knight to put their armor and will take care of horses and such.
While doing these things, they will also train to become a knight. Like most Medieval professions, being a knight required starting training from young age of 7, it was not possible to decide to become a knight in one's 20s or switch careers. Missed time of training made one unsuitable for the role.
On the battlefield a squire could serve as light cavalryman, using spare horse, but will do reconnaissance rather than fighting most of the time.
Squires too had a special status in society, just below that of a knight. Commoners had to show them respect and deference.
Once there is an opening in knights ranks and a squire is deemed worthy, he will be knighted. King will always do knighting personally. That is how important it was to select proper knights. So important that King will not delegate this to other lords.
Once knighted, a knight will be made a vassal to the baron and will be sent to live in their estate.
Yeoman
Particularly in England, there was an additional social and military rank of a Yeoman. Yeomans were longbowman and too enjoyed special status, because their skill with bow made them valuable as a military unit. Other countries did not have access to longbows and missed out of this type. I will later write separate article about bows.
Baron
Now we finally reached the first title of nobility proper, Baron. Baron is kind of medieval equivalent of a sergeant in modern military. He is backbone of military, economy and society. He also is hated by a lot of people for many different reasons.
In addition to his military duties, Baron is in charge of a single Manor. Modern people might think that Manor is some fancy historic building, but back in the days Manor is first and foremost a Medieval farm. Term manor applied to both the core building where lord of the manor lived, surrounding allotment of fields and even people who work the farm or lived in surrounding buildings.
Modern farm could be run by a single family because complex machinery like tractors, harvesters and combines allow few people to do all farm work. Back during Middle Ages, such machinery did not exist, even basic scythe was not invented yet and best harvesting tool was
sickle, yes, the same sickle communists later adopted as their symbol. Because of that agricultural work required a coordinated effort of many people as well as supervision from someone reliable.
Baron was in charge of the whole process, directing and coordinating work of peasants to make sure they produce the harvest and will not fuck up. Baron could appoint vogt and delegate most of supervision to him but was still ultimately responsible for results before king. If peasants will fuck up somehow and harvest will fail, then everyone will starve, thus someone reliable has to be in charge of the whole process. That someone was picked from the ranks of the knights and given title and rank of baron.
In addition to running the Manor, baron should also not neglect their military duties and be always ready to fight as a knight if king summons them to war. Not only they have to maintain their own readiness, but also those of knights that were given to him as vassals (subordinates), typically 4 or 5 depend on how productive his manor is. Baron had to make sure make sure knights and their horses are fed, equipment is in good repair and that they train enough to maintain their fighting abilities, hence why I compared this role to modern military sergeant. In medieval times sergeant was a much lower rank with no authority over anyone.
All these military expenses have to come from the profits, the manor makes. On top of that there are also taxes to be paid to the crown, or to the Earl to be precise who will later pay his taxes further up the chain of command.
Finally on top of that Baron has to know law and serve as judge for disputes between people of his manor.
Being in charge of so many things, barons were hated by all sorts of people. Peasants and knights alike saw them as slavedrivers. Higher ranks will blame them if something goes wrong. For commoners he was the big, hated boss, with power beyond their imagination, hence term robber baron. For higher nobles he was the small guy who has one job and yet somehow fails at it. That is why some barons prefer to be known as knights to be associated with knightly chivalry instead of robber baron moniker.
Earl/Count
There is a title of Viscount between Earl and Baron, but that title is delivered from that of a Count and hard to understand out of context so I will explain Count first.
Count is a guy in charge of a county. Medieval countries were divided into territorial units called counties. England and US states are still divided into them. You can see
here, how much land is that approximately. Earl is English equivalent of continental Count, just a different name for the same rank and duties. Wife of either Earl or Count is a Countess, and his heir is a Viscount, not to be confused with separate title of Viscount.
Average Medieval County consisted of several Manors as well as few towns and maybe a city. Count will run one of these Manors directly as if baron, would. Because of that every count has a subordinate title of baron. That is also why counts would look down on barons for only having one job, when they had two. That mean that count had his count job on top of his other job as a baron.
Other manors were run by different barons. These barons were subordinates to the count of their county. Count did have authority to command barons as his subordinates, especially in military situations. In peace time he would supervise that barons fulfill their various duties to the crown sufficiently enough. Barons also had to pay their taxes to the count.
Count in turn had to pay tax to his superior officer, Duke.
Counts will also supervise cities and towns, Medieval cities had special enumerated rights, that entitled them to democratically elected city council and other rights. That however did not mean that they were sovereign and could do whatever, their internal governance was democratic, but they still had duties to the crown and counts were in charge of making sure these are met.
Overall count was kind of a middle manager or military captain. Senior enough to have some authority and clot, yet not too big of a shot where a failure could result in some serious and often fatal consequences. He collected money from junior officers and pass them on to senior ones, was a middleman between King and the county, passing crown needs unto country but also advocating for his county in royal court. Count had some noble swag, but not too much of it.
Viscount
Sometimes a county would be split in two. When that happens, a bigger part will retain title and status of a county, and a smaller part will be dubbed viscounty instead. A viscount will then be created to run the newly created viscounty.
Viscount ranks between the proper count and baron. Viscount is the last of noble titles created, original system did not provide for this rank, but it was added later down the line. This rank shares its name with the title of heir to the county rank; the only difference is use of "of" between the name of the rank and the name of the place to which the rank applies. For example, Viscount of Shire will be a substantial title of a person who runs Viscounty of Shire and Viscount Shire is a courtesy title for the heir apparent to the title of Count of Shire.
Just because I mentioned it, medieval titles are named after some locality to which the power. Each count or baron will be given a certain particular county or manor to run, and their title will be delivered from the name of that county or manor. For example, Count of Cheshire runs county of Cheshire, and Count of West Yorkshire runs that county instead. By the way Cheshire is not made up for Alice in Wonderland, it's a real county and as Earl of Chester it is a subordinate title of Prince of Wales.
Some post medieval noble titles of modern peerage do omit 'of' because they were created after nobles' authority over land subdivisions and people who inhabit them was transferred to Parliament or local councils and by then noble titles no longer conferred any authority over any particular land. In that case tile was often delivered from surname. That said Ducal titles created for royal princes still use traditional 'of' style and delivered from various key localities across the UK even if they no longer confer authority over territory.
Back to viscounts. Viscounts had all the responsibilities of a count but none of his perks and status. One saving grace is that viscounty is typically smaller than a county, so less work and travel. In reality however viscounty often will be created from most remote and poor areas of the county, so same amount of work but less gain, less prestige and less money.
Just like count, viscount had barons as subordinates, but these were much fewer in numbers compare to what average count had. Some viscounts even went completely without vassals. That meant less taxes for viscount and less importance in hierarchy. Viscount was in that grey zone of irrelevance, similar to 2nd lieutenant.
The real reason viscounts were even created is not because they did anything useful, but because someone among more senior nobility had extra children in addition to an heir to their main title and needed to arrange his spares a title and land so that they will not go without. King obliged and created more titles just like modern politicians create jobs to keep employment numbers low. Viscounts existed in grey area between counts and barons and did something between what these two did.
Marquess
Marquess is a rank that at first glance look like the worst of them all, but in actuality one of the best ones. Marquess is in charge of a march or mark. March means borderlands, typically it borders some wild tribes who are hostile, warlike and think stealing crops from your manors is good idea. Your job as marquess is to defend the march and your marcher barons/lords from the hostile tribespeople. If that sounds like a lot of trouble that is because it is.
However, there are many redeeming qualities to being a marquess. To begin with marquess is exempt from taxation. A little something that makes one richer. Money is needed for defence of the march, so you do not have to pay to maintain the kingdom.
Second is the fact that marquess is allowed to build fortifications. A count or a duke, building giant citadel in the middle of the kingdom will raise instant suspicion of plotting to secede or challenge the king for the throne. A marquess doing the same in his march can always justify it by saying tribesmen are hostile. Later however marquess can use these fortifications in an internal power play.
Third is the fact that you can expand your land by taking the fight to the tribes. Counts of barons could only marry into other noble families and hope the other line will seize and they will inherit both titles. Marquess that located on the kingdom outer edge can simply conquer the unclaimed land, convert its inhabitants into peasants, or exterminate them and bring your own peasants, create new manors on claimed land and give them to vassal barons.
It a long process that could span generations but gradually it could allow your march to outgrow all the duchies and become de facto the most powerful lord in the realm. Many famous kingdoms and empires begun this way, Austria, before it was empire, or archduchy was actually a march and so were their rival Brandenburg-Prussians who later became German Emperors or even their neighboring Saxons. A junior branch of Hohenzollerns who got march of Brandenburg gradually and decisively eclipsed their senior inland branches. Even in England a Tudor dynasty has their origins in marcher lords in Wales.
All in all, marquess is a long term but a near surefire path to the throne. Now all this trouble defending it from hostile outsiders does not look as bad, does it.
To top it up, marquess is a direct vassal to the king, like dukes rather than counts, who are vassals of dukes. That gives marquess a direct line to king in case they need something. Unlike dukes however, marquess are rarely seen as potential rivals to the throne. They are often seen as having enough on their plate as it is and will not be burdened with more work for the crown, unlike more inland lords. Quite as sweet spot to be.
Duke
Duke is a true noble of the big league. They have special forms of address to make them stand out but this is but a tip of the iceberg of their true importance and power.
Dukes are few and are closest to the king. On one hand that gives them a lot of power and influence, even opportunity to become a king should things play out well or turn out this way. On the other hand, there is serious responsibility and serious risks. You control a lot so if you screw up, it will be serious blow for the kingdom for which you will not be able to get away easily. Even worse is the fact that king might feel threatened by your power and influence, not ever duke plots to take over the kingdom one day, but everyone has enough power and clot to do so and king may be wary, if he is not a fool. As much as you may plot to take over the kingdom, a king may plot to keep himself safe from either real or alleged plot of your, even if you mean king no harm, you may still get a dagger to the back.
Structure wise, dukes rule over dukedom, which is a cluster of continues. Just like counts supervise, tax and command barons, dukes supervise, tax and command counts.
There are typically but a few dukedoms in the entire kingdoms and every duke knows each other. Dukes are inner circle of the king, and they run the country together, make military plans together like joint chiefs of staff. On the battlefield dukes actually expected to command units independently, as king's lieutenants, and not just be supervisory authority like barons or counts. It is often expedient to split army into several units and dukes are ones who are called to command the splitter units.
Dukes are expected to work with king not just on battlefield but also on administration of the kingdom. During incapacity of Henry VI, different royal dukes took turns running the kingdom, disagreements over who is more worthy of being the regent gradually devolve into Wars of the Roses.
Most dukes are royals, i.e. related to king as brothers, uncles, cousins and such. Heir to the throne is also created a duke once of age. That allows heir to learn how to run a country while allow king to have at least one duke who is unlikely to plot against him. Nowadays heir to the throne is called prince, but that was more due to the exceptional circumstances surrounding Principality of Wales, unlike dukedoms, principalities could not be as easily created at will. Normally an heir will be made duke. Current and previous Princes of Wales still have Ducal titles as secondary ones.
There are however some dukes who are not royal. There is no established promotion path to a duke, and every such case is an exception in its own way. For example, Scandinavian in origin, Rolo the Viking was created Duke of Normandy by unrelated Capetian King of France to protect the area from other Vikings. A few generations later, now empowered as Kings of England and Dukes of Aquitaine, Dukes of Normandy came after French throne itself.
Being related to the king does not guarantee loyalty either, for example Capetian in origin, Duke of Burgundy, sided with Plantagenets of England against their relatives from de Valois dynasty. Wars of the Roses were also fought by English dukes, all of whom could trace their origin to Edward III.
Even if dukes do not plan to take over, they could still be called to fulfil royal duties, either permanently or temporarily. During war of the roses, de Valois kings would frequently be captured by either English or Burgundians, making dukes still loyal to the de Valois cause run France in their absence. De Valois themselves took the crown after mainlining Capetian branch died out, after being ducal for several generations suddenly they became royals again.
Because of that dukes are expected to be able to do everything a king does. In a way they are like spare kings, whose time may never come, but who still should be ready for the job.
King
Finally, we reached the king, pinnacle of medieval pyramid of power, asterisk attached. There were also pope, God, emperors and parliament who all claim supremacy on various grounds. Barons may try to overthrow you or make you sign Magna Carta. Pope may try to excommunicate you for not being good enough Christian. Emperors think they have universal authority that supersedes kings, just like that of kings supersedes dukes or barons. It was a hard game to play, but you were given good cards to play, better than those of dukes or popes.
As a medieval king, most of your time you will spend commanding your knights and nobles in various battles. You will have castles, but unlike modern palaces, the medieval castles were built for defensive purposes and were not too comfortable, much less luxurious. However, they could store enough food and water to let you and your troops to survive for years, cooped inside and every so often you will do just that.
Yet that was still better than what many others had.
Kings that only wave hands and do not command armies, only became a thing over the course of 18th century. Even famous Sun King Louis XIV, that does not
look like that tough of a guy,
actually commanded his armies on the battlefield. He built Versalles but spent a lot of time in a tent in a military camp, sieging places. Even these culottes, he wore, that revolution later decried as symbol of upper-class decadence, was this short because it would be inconvenient to tack long trousers into above knee tall military boots, that soldiers needed to traverse swamps. Not something sans-culottes Parisian working class would have to concern themselves with.
Medieval kings fought, died and made history. People like to read about decadence of Henry VIII and his obsession with producing a male heir, but in truth he was the first king who mostly lived in palace and not on the battlefield and could concern himself with such administrative and courtly concerns.
Medieval kings wore many hats. If you check the full title of King Charles III for example, in addition to royal title, you can find a few lesser ones, a ducal, and earl and a baronial one, in two examples. Medieval kings had to fight like a knight, ran own manor like a baron, supervise one county like a count and one duchy like a duke and then also be a king on top of that. If that sounds like a lot of work that is because it is. Juggling all these vassals, parliament, pope, rival kings of foreign kingdoms took a lot of time and effort, but also skill. Not everyone got it right, some failed.
Yet it's because medieval kings did so much that we admire them nowadays, they were truly in the most demanding role of their lifetime. It's because they do little nowadays, despite living in such expensive luxury, that sometimes people bring up a question do we still need monarchy?
Grand Duke
Grand Duke is an, euphemism for a ruler of the unrecognised county. Even during Middle Ages there were places like Taiwan, that were their own countries in every possible sense but lacked official recognition as such. Such places were referred to as Grand Duchy. One most famous was Lithuania, that was actually the biggest state in Europe, bigger than any Kingdom. However, pope, who was in charge of creating new kingdoms, denied this dignity to Lithuanians. Pope's problem with Lithuanians was their high tolerance of different religions and unwillingness to force convert people to Catholicism. For that reason, pope withheld (or even revoked) recognition of Lithuania as Kingdom and did not sent them their crown, like he would do to other kings.
That was Middle Ages so Pope possibly held monopoly on good goldsmith who could craft decent enough crown. Lithuanians had to do with rather simple ducal hat.
Later when Lithuanians Jagiellons united Lithuania with Poland in personal union, Poles would not press issue of Lithuanian recognition because Lithuania was bigger than Poland and only the fact that Poland was a kingdom and Lithuania was not would allow Poles to maintain a certain level of seniority within the union.
Perhaps in homage to Lithuania or out of personal humbleness, a dissolution of Holy Roman Empire, certain imperial princes, like Luxembourg and Baden assumed title of Grand Duke. Luxembourg still uses it.
Prince
Nowadays Prince is often seen as title of heir to the throne as well as that of various royals.
During Middle Ages Prince was a ruler of an entity other and often much smaller than a kingdom. Principalities of Monaco and Liechtenstein are examples of such entities. Historically Principality of Orange was possibly the most famous example, despite being so tiny, it somehow managed to exist completely surrounded by France for a very long time.
It was also used as a generic word for a ruler of something, in this capacity it was used by Machiavelli for his Il Principe novel.
In certain sense Prince is polar opposite of the Grand Duke. Sovereignty of Prince is fully recognised but they rule something that can hardly be called a country or a kingdom.
Emperor
Emperor is a King with a pretence to universal sovereignty. In theory Emperor traces origin of their title to Roman Emperors, claiming legitimate succession from Ceasar himself, in reality is such claims sounded stretched at best and completely made up at worst. In theory there could be only one Emperor but in practice there were many, each claiming they are the only one legit and the others are fakes.
Out of these Byzantine Empire was indeed a remnant of what was once a Roman Empire, but time changed them a lot from times of Ceasar and Augustus, especially when after members of Venetian crusade overthrew the last native emperor and replaced them with of crusade leaders.
Another, Holy Roman Empire (of the German Nation), was created from scratch by pope, but still claimed to be of universal authority of Roman Caesars and even disputed authority of popes, claiming that emperors are superior to popes and their clergy.
Byzantine empire had a different non-feudal internal administration, instead of counties, duchies and manors they had themes, that possibly worked like Muslim Iqta.
Holy Roman Empire was mostly feudal like other medieval kingdoms, but with their own unique traits like free cities. Emperor was elected and imperial Diet was more complex and bureaucratised than Estates General or Parliaments used by other kingdoms.
To back their claim to universal authority Holy Roman Emperors had several consistent kingdoms, held by the emperor together with his other titles, as well as Kingdom of Bohemia that was vassal to the emperor and prince elector. This was to lay claim that HRE is not just another kingdom with a fancy name, but an entity of higher authority than kingdoms around it. Similar to how USSR used Comintern, globe on their emblem and direct memberships of their subdivisions in UN to lay claim on a global authority rather than merely that or just another country. In both cases they functioned effectively as another country and their claims for universal authority were but claims with no substance.
Pope
Nowadays Pope is merely head of Catholic Church and has little influence outside this denomination. Back in Middle Ages however Pope was very influential and powerful. He could excommunicate kings, authorise invasions, call for Crusades and even transfer entire kingdoms from one dynasty to another. While not everything always went pope's way, he and the Church were often the only ones with long term vision for the future and often will get their way eventually if not immediately.
Pope claimed and still claims to be god's representative on earth and thus claimed authority over kings. Kings would often resist direct orders from a non-military man such as pope, but pope would play it by enticing their neighbors to take sword against those who provoked their ire. For example, he authorised Austrian Habsburgs to invade Bohemia and graded then full rights to Bohemian Crown and lands after native rulers converted to Hussite faith. Habsburgs ruled Bohemia for several centuries since, and Hussites went extinct. Pope also authorised Willam the Conqueror's invasion of England and granted him right to the kingdom. Only protestant reformation really put a dent into Pope's power.
Aside from such direct actions, Pope and Church would regulate things such as morals, ethics believes and such. They will also both sponsor and control science, first universities were founded by monks and Church. Things that may not have immediate effects but will determine long term development of society.
After Middle Ages Ended
Feudal system had its time under the sun, but eventually all things come to an end and so did Middle Ages. What have happened to nobles and knights since then.
To begin with knights, they had but one role, to fight and win wars. When they became ineffective, they were rather swiftly phased out. Nobles themselves sometimes continued to serve in heavy cavalry capacity, that rarely actually saw action, but plain knights with no higher titles became thing of the past.
Many centuries later knighthood was revived as an honour system for both military and civilian awardees. Modern knighthood shares with Medieval one the confirmation ceremony and nothing else.
Squires continued to exist as a rank of honor for various groups that were not nobles but were not commoners either. Sometimes it was conferred to gentlemen (sons of nobility) without any titles of nobility. Gradually it becomes associated with privilege and high status.
Yeomen became Yeomen of the Guard, ceremonial guards for various royal events.
Lower nobility (Barons, Viscounts and Earls (Counts)) mostly became peers and landowners. They no longer needed to support any knights or any other military and could use their profits for personal needs. Earl's power over counties were effectively abolished and they became little more than Barons with fancier titles. All three retained their manors and the land. Gradually many of them stopped using it for agriculture (though some continue to do so) and turned their manors into aristocratic country houses where they now lead varying degrees of frugally privileged life paid for from various other endeavors or by collecting rent from peasants turned farmers. That life however is but a far cry from that of higher nobility. Even if they continued agricultural use, they kept up with times and gradually replaced peasants with machinery.
At first, biggest work for lower nobility became attending parliament. Back in the days Commons did not have near complete control and Lords played significant role in parliamentary work. Gradually however Commons asserted more and more power and by now Lords are reduced to nearly ceremonial chamber with no real power or influence.
While their official roles now became nearly indistinguishable, their real financial situation varied. Some managed to evolve with times and prosper. Others lost their money, sold land and titles and became extinct.
Higher nobility (Dukes and sometimes Marquesses) continued to be granted to royals and sometimes to royal favorites like infamous and disliked by many, Duke of Buckingham. They continued their role as close advisors to kings and overall maintained a much higher standards of living and political importance compared to their lower nobility peers.
They too had place in House of Lords but few in number, they did not amount to much in one person, one vote system.
Higher nobility and kings were the one who really benefited from this development as they could really spread their wings and build themselves luxurious palaces instead of huge fortifications, they did during Middle Ages.
Kings gradually lost their powers to Parliament and cabinet, but they standards of living have only improved, and they now live like kings a very rich people who have special reason to be rich. Some think about abolishing monarchy but even if that happens, royals will likely retain their luxurious palaces and land ownership which will allow them to use these money to finance their lavish lifestyles.