 The spring is now housed in 18th-century buildings designed by architects John Wood, the Elder and John Wood, the Younger; visitor access is via an 1897 concert hall by J M Brydon, which is an eastward continuation of the Grand Pump Room with a glass-domed centre and single-storey radiused corner.Beside the baths, a temple, in classical style with four large, fluted Corinthian columns and dedicated to Minerva The temple remained in use for worship until around the 4th century, but the site is now occupied by the Grand Pump Room.The city was given defensive walls, probably in the 3rd century, but they disappeared during subsequent redevelopments.