The Church of St. Agatha at College with its poly-chromatic marble was built between 1600 and 1610, in late-Renaissance style, on the site of a previous church, which had also been dedicated to St. Agatha. The façade was created by Natale Masuccio, and is decorated with frameworks on a light coloured background. It has a Greek cross plant, with splendid Baroque decorations including frescoes by Luigi Borremans (18th century). The work on the adjacent Jesuit College began in 1589 and were completed in the second half of the 19th century.
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.