 The Guildhall at the front of the building was rebuilt by Bishop Tunstall in 1535, and again by Bishop Cosin in 1665.The 'new' town hall, at the rear, was opened in 1851 (at the same time as the indoor market, which extends beneath and either side of the hall).The latest major refurbishment took place in 2007, and the building continues to be used by the mayoralty and for civic events.