Parish Church of the Holy Cross is the oldest building in Tczew. The church was built in the 13th century and features a Baroque interior. The high brick tower is the oldest part of the church and its wooden top was destroyed during the fire in 1982. The interior church walls feature old frescoes, the oldest of which dates back to the latter half of the 15th century.
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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.