Rouen Castle, Medieval castle in Rouen, France

Rouen Castle is a 13th-century fortification featuring thick stone walls and a distinctive tower known as Tour Jeanne d'Arc. The tower still stands upright and forms the preserved core of the original structure, while surrounding foundations and wall segments outline the earlier layout.

The fortress was built between 1204 and 1210 by King Philip II of France to solidify his control over conquered Normandy. In the 15th century it served as a prison, and later it was used militarily by German troops during World War II.

The tower's name comes from Joan of Arc, held here from 23 December 1430 and tried in the keep between 21 February and 30 May 1431. One session took place in the tower on 9 May 1431, when she was shown the instruments of torture and answered that she would say nothing else. The tower was classified as a Historic Monument in 1840 and is now open to the public.

The tower stands on Bouvreuil hill, north of the old town, and is open to the public. It is the only surviving part of the castle; the rest was demolished in 1591, so there is no circuit of walls to walk. The interior is a single cylindrical space with a modern roof added in the 19th century.

The tower's present form is largely a 19th-century reconstruction: classified as a Historic Monument in 1840, it was restored between 1868 and 1884, when it was rebuilt and given its pointed roof. The medieval keep it replaced was the Grosse Tour, the northern corner tower of Philip II's castle.