Comburg was a Benedictine monastery founded in the late 1070s by the Counts of Comburg-Rothenburg on the site of their castle. The first monks were from Brauweiler Abbey, but in the 1080s an abbot from Hirsau Abbey was appointed, and this brought Comburg into the movement of the Hirsau Reforms.
The monks of Comburg were exclusively of noble birth, and accordingly resisted the Benedictine reforms of the 15th century, under the pressure of which the monastery became a collegiate foundation in 1488, rather than admit non-nobles to the community.
In 1587 Comburg was mediatised by Württemberg, which brought to an end its status as an Imperial abbey.
The community was secularised in 1803. The library survives in the Württemberg State Library, but the church treasure was melted down in the Ludwigsburg mint.
The buildings have had a number of uses since then. Until 1909 a regiment of invalid soldiers was based here. During World War II the site was used for a variety of training purposes and also at one point as a prisoner of war camp. After the war it was used briefly for housing displaced persons, but since 1947 it has housed a teacher training establishment.
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.