De Casillas a Casillas de Coria Historical milestone · Casillas de Coria, Valle del Alagón, Cáceres The municipality, documented since the sixteenth century as a place whose residents tended the pigsties and stables of Coria, was simply called Casillas until the 1916 municipal naming reform added "de Coria" to its name. 1916 Photo: Ajcordero at Spanish Wikipedia (Public domain) What to see and do in Casillas de Coria