St Cewydd's church, Disserth is a single chamber church with a bold west tower, the earliest feature is the (probably) 14th century south doorway with large jamb-stones and two-centred head. The arch-braced roof could also be 14th century. The earliest window is the 16th century south chancel window. There is a three-decker pulpit and flagstone floor. Some pews are patterned with Jacobean-style diamonds and circles, and have the name, and sometimes housename, of the owner. The oldest is dated 1666. A number of wallpaintings were discovered in 1954.
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.