The building and sanctuary were enriched by the visits of pilgrims to this shrine.In a side-chapel is a monument in coloured bog oak of Robert Curthose, eldest son of William the Conqueror and a great benefactor of the abbey, who was interred there.The cathedral, built as the abbey church, consists of a Norman nucleus (Walter de Lacy is buried there), with additions in every style of Gothic architecture.
Between the apsidal chapels is a cross Lady chapel, and north of the nave are the cloisters, the carrels or stalls for the monks' study and writing lying to the south.
The cathedral has forty-six 14th-century misericords and twelve 19th-century replacements by Gilbert Scott.
Both types have a wide range of subject matter: mythology, everyday occurrences, religious symbolism and folklore.
In 1971 Hill, Norman and Beard performed a total redesign, under the supervision of Cathedral Organist John Sanders and consultant Ralph Downes.
In 1999 Nicholson & Co overhauled the organ, when the soundboards, pipework and wind supply were renovated and the computer system was updated.
In order to help reach this target Gloucester Cathedral commissioned local solar company Mypower to install an array on the nave of Gloucester Cathedral.