Church of San Bartolomé de Gavín Monument · Sabiñánigo, Alto Gállego, Huesca Mozarabic church from the 10th-11th centuries, the northernmost of the Serrablo group and possibly one of the oldest; of the original building only the bell tower survives, with tripartite horseshoe-arched windows, and part of the south wall, the rest having been rebuilt in the 1970s by the Asociación Amigos de Serrablo. Photo: Diego Delso (CC BY-SA 4.0) What to see and do in Sabiñánigo