The renunciation of the royal vicariate Historical milestone · Serón de Nágima, Las Vicarías, Soria Image of Serón de Nágima, not of the place itself. The king exercised over these fortresses the right of vicarage, which he delegated to a cleric of his trust; in 1288 the renunciation of that right is documented, and the annexation of the territory to the bishopric of Osma, the origin of the comarca's name. 1288 Photo: Dgarcia29 (CC BY-SA 3.0) What to see and do in Serón de Nágima