'It is in Venice, and in Venice only, that effectual blows can be struck at this pestilent art of the Renaissance. Destroy its claims to admiration there, and it can assert them nowhere else.' This was Ruskin's war cry as he entered the now almost forgotten Battle of the Styles on the side against 'the school which has conducted men's inventive and constructional faculties from the Grand Canal to Gower Street.'But first the reader must know the difference...