Het Steen

Het Steen is a historic medieval castle in the old city center of Antwerp, Belgium, one of Europe's biggest ports. Built in 1200 – 1225, Het Steen is Antwerp's oldest building.

Previously known as Antwerp Castle, Het Steen gained its current name in around 1520, after significant rebuilding under Karl V. The rebuilding led to it being known first as "'s Heeren Steen" (the King's Stone), and later simply as "Het Steen" (The Stone). The Dutch word "Steen" means "stone", and is used for "castle" or "fortress", as in the "Gravensteen" in Ghent, Belgium.

The castle made it possible to control the access to the Schelde, the river that flows through Antwerp. It was also used as a prison between 1303 and 1827. Part of the castle was later demolished to make the roads to connect the south and the north part of the port. The remaining building contains a shipping museum, with outside on displayed on the quay, some real old canal barges.