[PAR] [TLE] Edward Hubbard [SEP] Edward Horton Hubbard (2 July 1937 – 31 May 1989) was an English architectural historian who worked with Nikolaus Pevsner in compiling volumes of the "Buildings of England".  He also wrote the definitive biography of John Douglas, and played a part in the preservation of Albert Dock in Liverpool. [PAR] [TLE] John Douglas (architect) [SEP] John Douglas (11 April 183023 May 1911) was an English architect who designed over 500 buildings in Cheshire, North Wales, and northwest England, in particular in the estate of Eaton Hall.  He was trained in Lancaster and practised throughout his career from an office in Chester.  Initially he ran the practice on his own, but from 1884 until two years before his death he worked in partnerships with two of his former assistants.
[PAR] [TLE] Edward Hubbard [ SEP ] Edward Horton Hubbard ( 2 July 1937 – 31 May 1989 ) was an English architectural historian who worked with Nikolaus Pevsner in compiling volumes of the " Buildings of England " . He also wrote the definitive biography of John Douglas , and played a part in the preservation of Albert Dock in Liverpool . [PAR] [TLE] John Douglas ( architect ) [ SEP ] John Douglas ( 11 April 183023 May 1911 ) was an English architect who designed over 500 buildings in Cheshire , North Wales , and northwest England , in particular in the estate of Eaton Hall . He was trained in Lancaster and practised throughout his career from an office in Chester . Initially he ran the practice on his own , but from 1884 until two years before his death he worked in partnerships with two of his former assistants .
Edward Hubbard wrote the definitive biography of an architect that designed over how many buildings?
Edward Hubbard wrote the definitive biography of an architect that designed over how many buildings ?
500
500