The first Roman-rite mass on the peninsula Historical milestone · Jaca, La Jacetania, Huesca Image of Jaca, not of the place itself. In the monastery of San Juan de la Peña the monks sang in 1071 the sext hour according to the Roman rite instead of the Hispano-Mozarabic one. It was the first Roman liturgy in Hispania, promoted by Sancho Ramírez and the legates of pope Alexander II. 22 de marzo de 1071 Photo: Juli Soler i Santaló (Public domain) What to see and do in Jaca