Norwich Castle is a medieval royal fortification in the city of Norwich, in the English county of Norfolk. It was founded in the aftermath of the Norman conquest of England when William the Conqueror ordered its construction because he wished to have a fortified place in the town of Norwich. It proved to be one of his two castles in East Anglia, the other being Wisbech. In 1894 the Norwich Museum moved to Norwich Castle and it has been a museum ever since. The museum & art gallery holds significant objects from the region, especially works of art, archaeological finds and natural history specimens.
The castle is one of the city's Norwich 12 heritage sites.