The Byzantine and Christian Museum was founded in 1914, and houses more than 25,000 exhibits with rare collections of pictures, scriptures, frescoes, pottery, fabrics, manuscripts, and copies of artifacts from the 3rd century AD to the late medieval era. It is one of the most important museums in the world in Byzantine Art. In June 2004, in time for its 90th anniversary and the 2004 Athens Olympics, the museum reopened to the public after an extensive renovation and the addition of another wing.
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.