Dunnideer Castle, now ruined, was a tower house located near Insch, Aberdeenshire. It was built c. 1260 partially from the remains of an existing vitrified hill fort in the same location. It consisted of a single rectangular tower of 15m by 12.5m with walls 1.9m thick. Evidence suggests that a first-floor hall existed. Evidence shows it had several floors.
The tower house is built within an older prehistoric vitrified hillfort dating to c. 250 BC. The prehistoric fort and tower house is a scheduled monument.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.