The Church of St Theodore in Nesebar, Bulgaria, was built in the 13th century, and the north and western façades survive from this era. The other walls and the roof were built later. It is a single nave church with a narthex and apse. The church is 8.70 m long and wide 4.15 m wide.
The façade is decorated with blind arches of worked stone and brick. The space under the arches is ornamented with staggered zigzag patterns of stone blocks and bricks.
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.