The Colony of New South Wales was a colony of the British Empire from 1788 to 1901, when it became a State of the Commonwealth of Australia. At its greatest extent, the colony of New South Wales included the present-day Australian states of New South Wales, Queensland, Victoria, Tasmania, and South Australia, the Northern Territory as well as New Zealand. The first "responsible" self-government of New South Wales was formed on 6 June 1856 with Sir Stuart Alexander Donaldson appointed by Governor Sir William Denison as its first Colonial Secretary.

Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. Australia is the largest country by area in Oceania and the world's sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a megadiverse country, and its size gives it a wide variety of landscapes and climates, with deserts in the centre, tropical rainforests in the north-east, tropical savannas in the north, and mountain ranges in the south-east.