The moat and round tower of Pencoed Castle may date from 1270 by Sir Richard de la More. It passed to the Morgans of Tredegar in the 15th century and a big new mansion on the east side and the gatehouse on the west side were built by Sir Thomas Morgan in c. 1490-1500. The gatehouse and corner tower are ruined and the mansion lies in a gutted and derelict state, though still with some flooring and the roof more or less intact.
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.