As the Bard Fortress, Champorcher Castle also belonged to the powerful Lords of Bard, until the fratricidal war between William and Hugo in 1212. Little is known of this early building: we know that it was burned down by order of Hugo of Bard, which might suggest that it was constructed mostly of wood, like many buildings in the late Middle Ages. It was probably reconstructed in the same century, and definitely before 1276, when already it needed to be roofed with wooden tiles.
Following the popular tradition, the castle was built on the Corseria (currently the sacristy), with a chapel that would later become the first parish church.Of the ancient building, it remains the square-plan tower (about six metres per side) with swallowtail merlons south-west of the church. It was used during the Middle Ages as a watchtower. Access is via a door which is can only be reached using a ladder placed four metres above the ground.
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.