Cairnbulg Castle is a z-plan castle situated in Cairnbulg, Aberdeenshire. Originally known as Philorth Castle, it was built in the early 14th century, destroyed in the winter of 1308–1309 in the Wars of Independence, and re-built by the Fraser family in 1380. Subsequently, a courtyard and outbuildings were added to the main tower. It is now open to the public by appointment only. Flora Fraser, 21st Lady Saltoun and her husband Captain Alexander Ramsay of Mar, who was one of Queen Victoria's great grandchildren, lived there for a while but nowadays their daughter Katharine Fraser, Mistress of Saltoun, lives there with her family.
During the Second World War the castle was used as the Officers' Mess for nearby RAF Fraserburgh.
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.