Sobre nobleza, rentas regias y señoríos en Castilla la Vieja, c. 1290-c. 1350

This paper aims to study the relationship between the money rents received by the nobility, assigned on royal taxes in certain places (situados) and seigneurial power. In order to do so, the information in the account books of Sancho IV that are preserved for the late 13th century (1292) and that of the Becerro de las Behetrias for the mid-14th century (1352) will be compared, focusing on areas that we know well from previous works. Both texts enable us to address the study of these aspects in a very important period in the development of the relationship between royal and noble power, a period of changes and transformations marked by crisis and conflict from the closing decades of the 13th century onwards.