The Ulvila Church, dedicated to St. Olaf, is one of the most significant medieval buildings in Finland. The first church was built probably in 13th century to Liikistö, which was a local trade centre. According old documents the graveyard around the church was consecrated in 1347 and church was burnt badly in 1429. Historians believe that the present stone church was built after that between 1495-1510.
There are several medieval and newer artefacts inside the church, for example crucifix and statue of St. Olaf from the 1430s and communion cup from the end of Middle Ages.
The Church has been renovated several times. During the latest renovation in 2005 archaeologists found the biggest medieval coin treasure in Finland. It was buried near the sacristy stone wall in 1390s and included 1476 silver coins.
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.