Parliament House, Canberra in the context of "Australia Act 1986"

The Australia Act 1986 is the short title of each of a pair of separate but related pieces of legislation: one an act of the Parliament of Australia, the other an act of the Parliament of the United Kingdom. The Acts eliminated the ability for the United Kingdom to legislate with effect in Australia, for the UK to be involved in any Australian government, and for an appeal from any Australian court to a British court. This act formally severed all legal ties between Australia and the United Kingdom.

In Australia they are referred to, respectively, as the Australia Act 1986 (Cth) and the Australia Act 1986 (UK). These nearly identical Acts were passed by the two parliaments, because of uncertainty as to whether the Commonwealth Parliament alone had the ultimate authority to do so. They were enacted using legislative powers conferred by enabling acts passed by the parliaments of every Australian state. The acts came into effect simultaneously, on 3 March 1986.

The Australian Capital Territory (ACT), known as the Federal Capital Territory until 1938, is an internal territory of Australia. Canberra, the capital city of Australia, is situated within the territory, and is the territory's primate city. It is located in southeastern Australian mainland as an enclave surrounded by the state of New South Wales (NSW). Exclaved from NSW after federation as the seat of government for the new nation, the territory hosts parliament house, High Court of Australia and the head offices of many Australian Government agencies.

On 1 January 1901, federation of the colonies of Australia was achieved. Section 125 of the new Australian Constitution provided that land, situated in New South Wales and at least 100 miles (160 km) from Sydney, would be ceded to the new federal government. Following discussion and exploration of various areas within New South Wales, the Seat of Government Act 1908 was passed in 1908 which specified a capital in the Yass-Canberra region. The territory was transferred to the federal government by New South Wales in 1911, two years prior to the capital city being founded and formally named as Canberra in 1913.

The National Triangle, also known as the Parliamentary Triangle, is the ceremonial precinct of Canberra, containing some of Australia's most significant buildings. The Triangle is formed by Commonwealth, Kings and Constitution Avenues. Buildings within the National Triangle have been located and designed intentionally for visual effect, and those of national significance are popular tourist attractions.

The National Triangle was a significant feature of Walter Burley Griffin's Plan for Canberra. The apices of the triangle are Parliament House, the seat of government; the Defence Headquarters at Russell; and City Hill, representing the civilian part of Canberra. Griffin planned the city around two axes which converge in the centre of the National Triangle. The land axis connects Mount Ainslie, Capital Hill and Red Hill and extends off towards Mount Bimberi the Australian Capital Territory's highest mountain. The water axis runs at right angles to the land axis along the length of Lake Burley Griffin.

Capital Hill (postcode: 2600) is the location of Parliament House, Canberra, at the south apex of the land axis of the Parliamentary Triangle.

The site was selected as the location of the Capitol in Walter Burley Griffin's Canberra design in 1912, which he envisaged to be "either a general administration structure for popular receptions and ceremony or for housing archives and commemorating Australian Achievements". The proposed building is commemorated in the name of the Capitol Theatre, Manuka. However, Griffin's name for the hill was subsequently changed to Capital Hill.