The union of the four villages of Peralta Historical milestone · Peralta de Calasanz, La Litera, Huesca Image of Peralta de Calasanz, not of the place itself. Peralta de la Sal, Calasanz, Gabasa and Cuatrocorz, four very depopulated settlements of the range, merged in 1970 into a single municipality that took the name of the saint born in the first of them. 1970 Photo: Falconaumanni (CC BY-SA 3.0) What to see and do in Peralta de Calasanz