Citadel Frederikshavn

The Citadel of Copenhagen is one of the best preserved citadels in Europe from the 17th century. It was built to secure the Northern entrance to the harbour of Copenhagen and was placed half on the old coast, half in the waters of the Sound. The present Citadel has followed two older citadels on this place: In the 1620s a huge Sankt Anna Fortress was begun, but it was never completed, and in the 1650s the smaller Citadel "Frederik" was built on the same place. It consisted of three bastions towards the land, and two towards the Sound, and had come to such a perfection, that is was succesfully used in the years of the Swedish siege of Copenhagen 1658-1660. (WorldOnline.com)