Trekroner Fort København

Gotta take a boat. But worth it

Great place full of history; if you climb the stairs, you have a great view of Copenhagen, Sweden, and the Øresund Bridge; it's a shame there's trash and cigarette butts everywhere.

Trekroner fort is a sea fort close to the Copenhagen harbour. It was constructed in the year 1787. The fort was an important part of the Danish line of defense during several wars and had a lot of military significance. Currently it looks like an abandoned building. Visited it as part of a canal tour.

Trekroner, meaning “Fortress of the Three Crowns,” is a historic maritime fortress located at the entrance to Copenhagen Harbour. Its origins date back to 1713, when three old warships were sunk to form the basis of a defensive battery. One of the ships was named Trekroner, and the fort was named after her. The current structure was built from 1787 onwards and was a key part of the Danish defences during the Battle of Copenhagen in 1801 and the British attack in 1807. Between 1818 and 1828, and again in 1860, the fort was expanded, but its strategic importance declined after World War I. In 1934, Trekroner was sold to Copenhagen Harbour Services. During the Nazi occupation of Denmark (1940–1945), the fortress was used by the Germans as barracks. After the war it served for a time as a prison for German officers and the former German ambassador. It then remained abandoned until 1984, when it was opened to the public. Trekroner is one of three artificial islands built to protect the harbour of Copenhagen, along with Middelgrundsfortet and Flakfortet, and today it represents a significant testimony to Danish military history.