Basílica de Santa Eulalia may have been the first Christian temple erected to Spain after Christianization of Roman empire. It was dedicated to Eulalia of Mérida, a young Roman Christian martyred in Augusta Emerita in 304 AD. The current church was built in the 13th century after it has been conquered by Christians during Reconquista.
Basilica contains collection of tombs of very distinct periods, oldest the considerably big, late-Roman mausoleums.
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.