This work is one of the principal narrative sources for the history of the kingdom of Castile during the reigns of Alfonso VIII (1158-1214) and Fernando III (1217-1252). This first period was important for the confrontation between Christian Spain and the Almohads who dominated Islamic Spain for nearly a century. Relates the catastrophe of Alarcos in 1195 when Alfonso VIII was thoroughly routed by the Almohads, and his extraordinary triumph over them at Las Navas de Tolosa in 1212. The chronicle also comments in detail the campaigns against the Muslims by Fernando III, perhaps Spain’s greatest king who was also a warrior and a Saint. His campaigns culminated with his conquests of Seville and of Cordoba in 1236. The author also covers some of the Crusades. This is Medieval and Renaissance Texts and Studies Volume 236.