The Skopje Aqueduct is the only aqueduct in Macedonia, and one of three largest and well preserved in the former Yugoslavia.
The question of when the Skopje Aqueduct was built is unclear. There are three theories, it may have been built during the reign of Rome (1st century), during the reign of Byzantine Empire (reign of Emperor Justinian I) or during the reign of Ottoman Empire. According to this latest theory the aqueduct was built in the 16th century for the many Turkish public hamams.
This aqueduct was in use until the eighteenth century. Only about 386 meters with 55 arches of this structure of stone and brick remain.
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.