The Monastery of Royal Saint Mary of Iranzu is a Roman Catholic monastery located in Abárzuza, Navarre. It was founded by Pedro de Artajona in the late 12th century, being Artajona's place of burial upon his death in 1193. The Cistercian Order had a large part in its building throughout the 12th century.
It was dissolved in 1839 and confiscated by the State. It was abandoned and became ruinous until 1942, when the Provincial Government of Navarre refurbished it. One year after, a Theatine Fathers community was established there. The Cistercian-style church was built during 12th century. The cloister is partly Cistercian (12th century) and partly Gothic (13-14th centuries). Additional minor Renaissance parts were added during 17th century.
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.