 Following a number of extensions to the parliament and departmental buildings and a fire in 1916 that destroyed the Centre Block, Parliament Hill took on its present form with the completion of the Peace Tower in 1927.Since 2002, an extensive $1 billion renovation and rehabilitation project has been underway throughout all of the precinct's buildings; work is not expected to be complete until after 2028.Parliament Hill is a limestone outcrop with a gently sloping top that was originally covered in primeval forest of beech and hemlock.