In a previous video, we already talked about the feudal system, how you can have a king, and then you might have some vassals of the king who give an oath of fealty to the king in the homage or homage ceremony. Might be a duke. And you could keep going down this. Maybe you have a count. Maybe you have a baron. And you could keep going down this chain of nobility where one noble is pledging fealty to the king, is a king's vassal, but then they are lord of another vassal. And you keep going all the way down until you get to a plot of land where the actual work might occur.