Church of Orós Bajo Monument · Sabiñánigo, Alto Gállego, Huesca Church of Santa Eulalia de Orós Bajo, in Mozarabic or Lombard Romanesque style from the 11th-12th centuries, one of the latest and most elaborate examples of the Serrablo group; notable is the semicircular apse with blind arcading and pilaster strips already Romanesque in feel. It is part of the group of the churches of the Serrablo, fourteen churches built between the mid-10th and mid-11th centuries, which are among the oldest Christian churches preserved in Spain. It is located in the small village of Orós Bajo, with barely twenty-two inhabitants, on the left bank of the Gállego river, at the start of the Valle de Tena, one kilometre from the Os Lucás waterfall, much visited by tourists and canyoners. Photo: Willtron (Wikimedia Commons) (CC BY-SA 3.0) What to see and do in Sabiñánigo