 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 (1066â1087) ordered its construction because he wished to have a fortified place in the important city of norwich. it proved to be his only castle in east anglia. it is one of the norwich 12 heritage sites. the castle now houses the norwich castle museum, which holds significant objects from the region, especially archaeological finds. ==history== norwich castle was founded by william the conqueror some time between 1066 and 1075. it originally took the form of a motte and bailey. early in 1067, william the conqueror embarked on a campaign to subjugate east anglia, and according to military historian r. allen brown it was probably around this time that norwich castle was founded. the castle is first mentioned in 1075 when ralph de gael, earl of norfolk, rebelled against william the conqueror and norwich was held by his men. a siege was undertaken, but ended when the garrison secured promises that they would not be harmed. norwich is one of 48&nbsp;castles mentioned in the domesday survey of 1086. building a castle in a pre-existing settlement could require demolishing properties on the site. at norwich, estimates vary that between 17 and 113 houses occupied the site of the castle. excavations in the late 1970s discovered that the castle bailey was built over a saxon cemetery. historian robert liddiard remarks that "to glance at the urban landscape of norwich, durham or lincoln is to be forcibly reminded of the impact of the norman invasion". until the construction of orford castle in the mid-12th century under henry&nbsp;ii, norwich was the only major royal castle in east anglia. [[file:norwich castle, 1845.jpg|thumb|left|300px|a mid-19th-century engraving of norwich castle from [[charles
Archaeological_museums_in_England Art_museums_and_galleries_in_Norfolk Castles_in_Norfolk Decorative_arts_museums_in_England Egyptological_collections_in_England Grade_I_listed_buildings_in_Norfolk Grade_I_listed_castles Museums_in_Norwich Natural_history_museums_in_England Prison_museums_in_the_United_Kingdom