 The ancient borough of Southwark, was traditionally known simply as The Borough—or Borough, to distinguish it from 'The City', and this name has persisted as an alternative name for the area.The medieval heart of Southwark was also, simultaneously, referred to as the ward of Bridge Without when administered by the City (from 1550 to 1900) and as an aldermanry until 1978.The local government arrangements were reorganised in 1900 with the creation of the Metropolitan Borough of Southwark.