The Harhoog is a dolmen, a rectangular megalithic tomb from the Funnelbeaker culture, located near Keitum on the island of Sylt in Schleswig-Holstein, Germany. Discovered in 1925, it was moved to the present site in 1954 when a new airport was developed.
The megalithic Harhoog burial chambers were originally located near the mud-flats between Keitum and Tinnum. The stones were moved to the area near the Tipkenhoog on the coast near Keitum in 1954, when Sylt Airport was under development.
The graves at Harhoog are dated to the Neolithic and belonged to ancient settlements of the island's Funnelbeaker culture, probably around 3000 BC. There were once approximately 600 of them but today only about half of them still exist.
The megalithic tombs are built with large, rough stone slabs (one or more) which are arranged in different patterns. Harhoog dolmen is an extended dolmen, under Ernst Sprockhoff's six-category classification; the other five types are simple dolmen, great dolmen, passage grave, long barrows (without a burial chamber) and cist.
Harhhog was discovered in 1925 during excavations of earth for the construction of the Hindenburgdamm, but was only inspected archaeologically in 1936.
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.