Festivities of Santa Cruz de la Serós Activity · Santa Cruz de la Serós, La Jacetania, Huesca Image of Santa Cruz de la Serós, not of the place itself. Santa Cruz de la Serós's festival is held in the town that takes its name from the royal monastery of Benedictine nuns where doña Sancha, daughter of Ramiro I, retired, and who on her death in 1097 received a Romanesque sarcophagus moved to Jaca in 1622. Photo: Ecelan (CC BY-SA 4.0) What to see and do in Santa Cruz de la Serós