Church of Langa del Castillo Monument · Langa del Castillo, Campo de Daroca, Zaragoza The parish church of Langa del Castillo, in the Campo de Daroca comarca (Zaragoza), is dedicated to San Pedro Apóstol. According to the Diccionario de Madoz, in the 19th century it was served by a priest, appointed either by the crown or by the ordinary depending on the month of the vacancy, together with a chaplain. Photo: Jaime Calatayud (CC BY-SA 4.0) What to see and do in Langa del Castillo