Korskirken is located at the intersection of the streets Kong Oscars gate and Nedre Korskirkeallmenning and dates back to the latter half of the 12th century. The name of the church refers to the True Cross (and not to its cruciform plan), and is usually rendered in English as 'Holy Cross Church'. This is because it was, as one of only a Norwegian churches, in possession of a relic from the True Cross. This relic was later stolen by the Danish king, along with several other relics from all over the country, during the Reformation.
Korskirken was first mentioned in Sverris saga from 1185. At the time of construction, the church was situated on the shore of Vågen, probably marking the southern border of settlement in Bergen. Korskirken was damaged in the fires of 1198, 1248, 1413, 1582, 1623, 1640 and 1702; the church originally had two towers, but one was destroyed in the 1582 fire and never rebuilt. It was originally built with straight rectangular plan. The church got its cruciform plan when transepts were added around 1615-1623.
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.