History of Sydney
With the inauguration of the Commonwealth of Australia on 1 January 1901, Sydney ceased to be a colonial capital and became the capital of the Australian state of New South Wales. With industrialisation, Sydney expanded rapidly, and by the early 20th century it had a population well in excess of one million.
City of Sydney
The "City of Sydney" was established on 20 July 1842 by the Corporation Act which encompasses present-day Woolloomooloo, Surry Hills, Chippendale and Pyrmont, an area of 11.65 km². There were six wards established by boundary posts. A boundary post still exists in front of Sydney Square.