sentences:  Relatively few houses in the city centre survive from the Georgian era, one is Richard Cobden's townhouse from the 1770s.Another survival is row of three-storey town houses built in red brick with sandstone dressings, now used as shops and offices in Princess Street.Terraced houses were built on Byrom Street and Quay Street for the middle classes at the turn of the 18th and 19th centuries but few dwellings for the working classes survive except for a few north of Piccadilly Gardens and in Castlefield.