 The north wing was requisitioned and converted to accommodate the first NSW Parliament House in 1829 because it was the largest public building in New South Wales at that time.Housing the Colonial Representative Government it was the first Parliament in Australia.Aside from its significance as the legislative arm of government in New South Wales, Parliament House has played a key role in the history of Australia as two important conventions were held to look at the issues of Federation of the colonies and the drafting of the Australian Constitution.