The sacristy and the northeast side of the Danderyd Church were built around 1400. The current appearance dates mainly from the restoration made in 1600s. The church has a strong relation to Baner noble family, who owned the church lands and the near Djursholm Castle for centuries. There are two grave of Baner family in the church and the pulpit (1628) and altar (1707) are donated by them. Among other inventory there are also a medieval Christ sculpture (1100s), curificix (early 1200s) and Madonna sculpture (1300s).
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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.