Herford Abbey was the oldest women's religious house in the Duchy of Saxony. It was founded as a house of secular canonesses in 789, but moved later to the present site. The city of Herford grew up on this site around the abbey. The abbey was dedicated in 832 and was elevated to the status of a Reichsabtei ('Imperial abbey') under Emperor Louis the Pious (d. 840).
Between 919 and 924 Herford was destroyed by Hungarians but was rebuilt by 927. In 1147 the abbey, which by this time had almost 850 estates and farms, was granted Imperial immediacy. This made it an independent territory within the Holy Roman Empire which lasted until 1803.
In 1533, during the Reformation, Herford Abbey became Lutheran, under the Electors of Brandenburg. From 1649 for over a century the abbesses were all Calvinist but that did not alter the Lutheran character of the principality.
In 1802 the abbey was dissolved in the course of secularisation. In 1804 it was turned into a collegiate foundation for men, and in 1810 finally suppressed. The former abbey church remains in use as Herford Minster (Herforder Münster). The church is a late Romanesque hall church, built about 1220-1250. It is one of the earliest hall churches in Germany.
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.