Birse Castle is located in the Forest of Birse, Aberdeenshire. The original structure was a square three-storey tower house with turrets and a corbelled circular tower at the south east. The building is owned by Viscount Cowdry, Dunecht House, Dunecht, Aberdeen.
The castle was built about 1600 for the Gordons of Cluny. When the Gordons built Birse Castle, they encroached upon The Forest of Birse, which consisted of about 24 farms. Eighteen of these were owned by the Gordons, but the owners of the other six farms did not take too kindly to the Gordons intrusion and burned down the castle about 1640. The castle was a ruin by 1887, but restoration started in 1905. In 1930 a three-storey wing was added.
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.