Parliament House also referred to as Capital Hill, is the meeting place of the Parliament of Australia, located in Canberra, the capital of Australia. The building was designed by Mitchell/Giurgola & Thorp Architects and built by a Concrete Constructions and John Holland joint venture. It was opened on 9 May 1988 by Elizabeth II, Queen of Australia. It cost more than A$1.1 billion (equivalent to about $4.3 billion in 2018) to build.