The Poema de Fernán González is a Castilian epic poem, specifically, a cantar de gesta of the Mester de Clerecía. Composed in a metre called the cuaderna vía, it narrates the deeds of the historical Count of Castile, Fernán González. It was written between 1250 and 1266 by a monk of San Pedro de Arlanza. In 1960 a fourteenth-century Arab roofing tile was discovered in Merindad de Sotoscueva north of Burgos that had some verses of the poem scrawled on it in Old Spanish. It is the oldest copy of (a part of) the work.