Rocroi (French pronunciation: [ʁɔkʁwa]) is a commune in the Ardennes department in northern France.

The central area is a notable surviving example of a bastion fort.

Because of its strategic location in the north of France it changed hands a number of times during wars.

In the 1670s the fortifications were re-modelled by the French engineer Vauban.

[5] In 1815, two months after the Battle of Waterloo, the town was taken by Prussian and British forces (on 16 August).