Eschenbach Abbey was founded as a nunnery in 1285 and was moved to the current site in 1309. In 1588 the nuns joined to the Cistercian Order. The guest house was built in 1612 and new monastery church in 1625. The new neo-Baroque monastery church was built and consecrated in 1910. The famous sundial, largest of its kind in Switzerland, was built in 1683.
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.