Now, this is not so easy to govern, especially during the Middle Ages, and the king might owe many people things, especially people who helped the king come to power, helped him depose the previous king or to conquer this land. And so in exchange for that and to help govern, he might grant land or feasts to other people. And the key currency in the Middle Ages under the feudal system is land, and land in exchange for loyalty and service. So this whole thing is a kingdom. Now, right over here, this is a duchy, and a duchy will be controlled by a duke. I guess they didn't call it ducky because that just doesn't sound as serious. So the king might grant a duchy, a duchy to a duke, and in exchange, the duke would provide loyalty, pledge their fealty.