San Andrés is a church in the parish of Bedriñana. It dates to the 9th century and was declared a national monument in 1931. The nave was built in the tenth century. Four of the original windows above the nave survive. Significant additional expansion occurred in the 12th-13th centuries and again in the 16th. In 1916, additional improvements were made to the building for use as a school.
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.