Avanduse manor (Awandus) was first mentioned in 1494. The origins of the present-day building was a building that was erected in 1679-1684 by Tallinn master builder Gerd Vorberg at the initiative of the landowner at the time, Gideon von Fock. The building has however been heavily rebuilt since, with final changes being made by architect Rudolf von Engelhardt in 1890. Russian geographer Fyodor Litke is the most famous owner of the estate, and a plaque dedicated to his memory hangs from a wall of the manor.
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.