The Church of St John dates from the twelfth century, the date of the nave, although the chancel is fourteenth century and the roofs and tower fifteenth century. It has a well-preserved Norman window. The building is of Old Red Sandstone. The church was restored in 1860-65 by John Prichard and John Pollard Seddon and again by G.E.Halliday in 1900–01.
Memorials to a number of members of the Raglan branch of the Somerset family, whose seat is nearby Cefntilla Court, can be seen in the church.
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.