The San Giovanni in Fiore Abbey date back to Joachim da Fiore's trip to La Sila in Calabria in 1188. Archaeological excavations have shown the presence of Joachim's first edifice, which was finished in 1198, in the Iure Vetere locality. The construction of the abbey was approved by Queen Constance of Hauteville after a Joachim's visit in her court at Palermo.
After Joachim's death in 1202, the first monastery and its annexed edifices were burned by a fire in 1214. The monks decided to abandon the location of Iure Vetere, also due to its difficult climatic situation.
In 1215 a site not far from the previous one was chosen, near the Neto river valley. The new abbey was completed in 1230, in the Romanesque style. In later centuries features were remodeled in different styles, including a Baroque style church interior.
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.