Gloucester Castle

51°51′47″N 2°14′56″W / 51.863°N 2.249°W / 51.863; -2.249

The castle keep in use as part of the county gaol (jail) in the 18th century. (A later work said to be based on an 1819 original)
1610 map showing position of Gloucester Castle on the River Severn, with Gloucester Cathedral (centre, until 1541 Gloucester Abbey) to its north-east

Gloucester Castle was a Norman-era royal castle situated in the city of Gloucester in Gloucestershire, England. It was demolished in 1787 and replaced by Gloucester Prison.