Santa María de Óvila is a former Cistercian monastery built in Spain beginning in 1181 on the Tagus River near Trillo, Guadalajara, about 90 miles (140 km) northeast of Madrid. During prosperous times over the next four centuries, construction projects expanded and improved the small monastery. Its fortunes declined significantly in the 18th century, and in 1835 it was confiscated by the Spanish government and sold to private owners who used its buildings to shelter farm animals.