Pielenhofen Abbey for Cistercian nuns, dedicated to the Assumption of the Blessed Virgin Mary, was founded in 1240 by the lords of Hohenfels and Ehrenfels. In 1542, during the Reformation in Pfalz-Neuburg, it was placed under secular administration. In 1655 it was subordinated to Kaisheim Abbey as a sub-priory.
During the secularisation of Bavaria in 1803 the priory was dissolved; the nuns' church became a parish church. In 1806 Carmelite nuns from Munich and Neuburg an der Donau moved into the premises as a joint nunnery. In 1838 the Visitandines, also known as Salesian Sisters, bought it, and established a girls' school here. In 1981 the Pielenhofen Primary School, a boarding school of the Regensburg Cathedral Choir, replaced the earlier school. In 2010 the five remaining nuns moved to the community of the Visitandines at Zangberg.
The Baroque church has two towers of three storeys, two aisles and a transept, under a cupola in the centre. The church contains a late Baroque high altar with eight columns. The ceiling with a depiction of the Holy Trinity is by Jacob Carl Stauder. The pictures of the twelve apostles are by Johann Gebhard of Prüfening Abbey.
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.