 The Parliament Buildings are three edifices arranged around three sides of Parliament Hill's central lawn, the use and administration of the spaces within each building overseen by the speakers of each chamber of the legislature.The Centre Block has the Senate and Commons chambers, and is fronted by the Peace Tower on the south facade, with the Library of Parliament at the building's rear.The East and West Blocks each contain ministers' and senators' offices, as well as meeting rooms and other administrative spaces.