[4] The building consisted of a council chamber and an armoury (where weapons were stored prior to the civil war) on the first floor.

[3] The building was considerably enlarged to a design by William Killigrew in 1725, and a series of specially commissioned paintings by Jan Baptist van Diest was subsequently put on display.

[4] The current Bath stone building, designed by Thomas Baldwin, was built between 1775 and 1778[1] and extended by John McKean Brydon in 1893.

The central dome and the north and south wings were added in 1893[1] and form a contiguous building with the Victoria Art Gallery, which was also built around the same time.

[11] The 19th-century archway at the rear of the building, on Orange Grove, is a Grade II listed structure.