The Church of St Cadoc is medieval, of Old Red Sandstone with a stone tiled roof. The nave is quite long, ending in a battlemented tower and turret. The church was extensively restored in the nineteenth century, including work undertaken by John Prichard, following the collapse of the south wall.
The interior includes a large wall painting of the early fifteenth century depicting St George slaying the dragon. The Royal Commission on the Ancient and Historical Monuments of Wales describes a possible interpretation of the painting as being a reference to the defeat of Owain Glyndŵr by the English at the battles of Campston Hill (1404) and Grosmont (1405), which were fought near to Llangattock Lingoed.
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.