The heart of the Georgian city was Wood's Pump 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 1749 and 1810 when it became known as The Kingston Assembly Rooms. In 1728 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 December 1820 and rebuilt, lasting until demolition in 1933 for road improvements on the site now known as "Bog Island".