Church of Sástago Monument · Sástago, Ribera Baja del Ebro, Zaragoza The parish church of Sástago (Ribera Baja del Ebro, Zaragoza), next to the Monastery of Rueda, was built in the 17th century on the site of an earlier church and is dedicated to Our Lady of the Pilar. It is Baroque in style, with a single rectangular-plan nave divided into three bays by transverse arches, built of rubble masonry and brick reinforced with ashlar, and a three-tier bell tower topped by an octagonal section. Photo: Diego Delso (CC BY-SA 4.0) What to see and do in Sástago