Abstract

The aim of the article is to analyze the double movement around the legal construct “Señor Natural” that takes place in Las Siete Partidas by Alfonso X, a key concept in the wise King’s political program. On the one hand, the concept of “Señor natural” is reworked and becomes legal, placing the king above any other order; on the other, the obligation regarding the “Señor natural” is established as the best of all “natural obligations”. All this conflates into a new concept of “Señor natural” based on men and the land, which becomes a natural obligation in Partidas, a monarch’s reinforcement to exercise dominium in the totality of the kingdom.