 The heart of the Georgian city was Wood 's <unk> Room , which , together with its associated Lower Assembly Rooms , was designed by Thomas Baldwin , a local builder responsible for many other buildings in the city , including the terraces in Argyle Street and the Guildhall , The Lower Assembly Rooms consisted of two buildings . The first built in 1708 for Thomas Harrison overlooking Parade Gardens between North Parade and Bath Abbey . A large ballroom was added in 1720 , with further enlargement in <unk> and 1810 when it became known as The Kingston Assembly Rooms . In <unk> another building , known as Lindsey 's Assembly Rooms , was constructed , lasting until demolition around 1820 for the building of York Street . Harrison 's Lower Assembly Rooms were devastated by a fire in 1821 and rebuilt , lasting until demolition in 1933 for road improvements on the site now known as " <unk> Island " . 
