In 831, some Venetian merchants arrived near Cropani on their way back from Alexandria where they had collected the remains of the Evangelist Mark. According to this reconstruction, the ship was caught in a bad storm and wrecked near the beach of Cropani. The inhabitants aided the merchants who, as a sign of recognition, gave them a fragment of the kneecap of the saint’s right knee, kept in the church of Santa Maria Assunta (the Duomo).
Later, the merchants awarded the people of Cropani the honorary citizenship of Venice.The mother church or the Assunta is a monumental building whose first layout dates to the 13th century. The structure was built with large blocks of tufaceous granite and stands out because of its imposing bell tower, 43 metres high compared to the original 47.
The church of the Assunta houses notable works of art including statues, relics, paintings and frescoes in 18th century Baroque style and a notable wooden ceiling with arabesques with 15th century paintings.
The little ‘Antiquarium Diocesano’ museum inside the Duomo can be visited. It holds many works of sacred art including half-bust reliquaries sculptured in the round, finely decorated in damascened gold leaf dating to the 16th century, precious silver items and sacred 18th century vestments and also an interesting marble tabernacle sculptured bas-relief dating to 1545.
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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.