The history of Herttoniemi Manor dates back to the 16th century. The Herttoniemi area is probably named after Laurens Hertoghe who might have been the first owner of the manor. The heyday was in the late 1700’s, when the manor was owned by Augustin Ehrensvärd. He led the construction of Suomenlinna fortress.
The present main building originates from the beginning of 19th century, when the manor was owned by admiral Carl Olof Cronstedt. The old porcelain factory was changed as the new main building and the park was established around it.
Today Herttoniemi park is an artistically unique milieu. The combination of baroque and English garden is one of the greatest in Finland. The main building functions as a manor museum and the park is open to the public. There is also an old old farm brought from Sipoo which is an outdoor museum.
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.