As part of a £15m project, the museum and art gallery has remained open to showcase outstanding collections of fine art, archaeology, and natural history.
While the medieval keep, which is currently closed ahead of being transformed to its former glory as a royal palace, is due to reopen in 2024.
As the wait continues, we take a look at the castle from its development from a prison in the 1800s to today, where it is considered one of the country's best museums.
Castle Gardens photographed sometime in the early 1900s. (Image: Newsquest)
The Castle Book Stall next to the old Agricultural Hall building in the 1920s - replaced by a new stall just after this picture was taken but ceased to be a bookstall in the late 1990s. (Image: Newsquest)
Medieval graffiti of a sword located in the keep of Norwich Castle. (Image: Newsquest)
Norwich Castle Gardens sometime in the 1950s. (Image: Newsquest)
Norwich Castle before the Castle Mall development. (Image: Newsquest)
Whiffler Theatre in Norwich Castle Gardens, 20th June 1983. (Image: Newsquest)
A view of the bridge leading to Norwich Castle taken from the Castle Gardens, 25th February 1986. (Image: Newsquest)
A guided tour of Norwich Castle Museum battlements, 1990. (Image: Newsquest)
Members of the East Anglian Medieval Association in action at Norwich Castle, 19th December 1992. (Image: Newsquest)
Work under way on Norwich Castle Museums glass lift in December 2000. (Image: Newsquest)
The Castle dungeon experience included a dramatised staging of a prisoner. (Image: Newsquest)
Patricia Day and Lee Warden recreate a Christmas scene at the Castle Keep, 2017. (Image: Newsquest)
The keep prior to its renovation. (Image: Creative Commons/David P. Howard)
Works are under way to recreate the castle's keep to its Norman-era layout. (Image: Newsquest)
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