The Espoo Cathedral is a medieval stone church built in the last half of 15th century. The church is thus the oldest preserved building in the city. The church was originally designed in by an unknown "Espoo master" and built between 1485 and 1490 under his supervision.
The only remaining parts of the medieval church are the eastern and western parts of the nave. The weapons room was removed between 1804 and 1806 and certain other parts of the church, including the original sacristy, were taken apart between 1821 and 1823 when the building was converted into a more spacious cruciform church.
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.