Montuenga Castle in Soria, Spain forms part of the defensive line of the Jalón River set in a natural passage between the plateau and strategic basin of the Ebro. The area was subject to disputes, notable during the Castilian Civil War.
The castle is perched on a high hill, steep and long, from which it dominates the town of Montuenga de Soria. The remains of the building, two polygonal towers at each end, are joined by walls.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.