Hammershus is the largest medieval fortress in Northern Europe. It is located at an altitude of 74 meters above sea level on the Northern part of the Danish island of Bornholm in the Baltic sea. The castle was built in the 13th century, and has long served as the residence of the Archbishop of Lund, however, thanks to the latest research by historians, it became known that the castle was built as a Royal residence for Valdemar II, king of Denmark. It is also assumed that the castle was the base for the crusaders.

The fortress consists of a main castle and surrounding towers, surrounded by a stone wall, which stretches for 750 meters around the castle grounds. The bricks that scientists found in the excavations have helped to clarify the construction of the fortress.

The fortress was repeatedly singled out by the Royal troops in times of conflict Danish kings and archbishops of Lund. In 1658 the Hammershus was captured by the Swedes, but the revolt of the inhabitants of Bornholm inspired Swedish king to liberate the fortress and return it to the Danes.

The fortress is sometimes used as a prison. In 1750, the castle was partially destroyed, in ruins. In 1990 it was partially restored.

Visitors of Hammershus offer beautiful views of the coast and sea around Bornholm. South of castle valley, dense forest.

Bornholm is an island, where in summer it darkens just 4 hours. Many Danish artists created impressive images of Hammershus. The most famous is the painting, written by Anton Childroom. It is exhibited in the art Museum of Bornholm.