The new city of Kalmar built on Kvarnholmen around the mid-1700s. The transfer from the old town was largely completed in 1658. The new, fortified town was planned after the current renaissance ideals. According to this pattern were placed Kalmar Cathedral and town hall across from each other at a major square Stortorget Kalmar. The cathedral was built, designed by Nicodemus Tessin the Elder and is one of the foremost examples of Baroque breakthrough in Sweden. Kalmar Cathedral drawing series reflects the complex interaction between the new style, liturgical considerations, tradition and the fortress-city requirements. The work began in 1660, but it was interrupted on several occasions, including when the Scanian War (1675–1679) raged. Construction resumed, and Kalmar Cathedral stood finished in 1703.
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.