from the bridge running east–west that once crossed this stream. Pitt Street is the retail heart of the city which includes the Pitt Street Mall and the Sydney Tower. Macquarie Street is a historic precinct that houses such buildings as the State Parliament House and the Supreme Court of New South Wales. Boundaries The New South Wales Geographical Names Board defines the area covering the central business district as the suburb named "Sydney". The formal boundaries of the suburb "Sydney" covers most of the peninsula formed by Cockle Bay in the west and Woolloomooloo Bay in the east. It extends north to Circular Quay, Bennelong Point and Mrs Macquarie's Chair, east to Woolloomooloo Bay and the eastern boundary of the Domain and Hyde Park, south to Goulburn Street just north of Sydney's Chinatown (Haymarket), and west to cover the Darling Harbour area on the western shore of Cockle Bay. However, it does not include the northwestern portion of the peninsula which includes the Barangaroo, the Rocks, Miller's Point, Dawe's Point and Walsh Bay area, which are formally separate suburbs grouped by the City of Sydney into the "small area" called "The Rocks - Miller's Point - Dawe's Point". Although not part of the CBD, Chinatown, Haymarket, the Rocks, Miller's Point and Dawe's Point are often regarded as part of the city centre. The postcode zone 2000 is also roughly correlative with the city centre. "Sydney City" is very occasionally used to refer not only to the City proper, but also its nearby inner suburbs such as Pyrmont, Haymarket, Ultimo and Woolloomooloo. City of Sydney boundaries over time The City of Sydney is traditionally the governing authority for Sydney's city centre. However, the boundaries of the City of Sydney have always been larger than the city centre or CBD. For example, Pyrmont has been in the City of Sydney since 1842 but is usually considered to be an inner western suburb, not a part of the Sydney city centre or CBD. Today's City of Sydney is far larger than the city centre or CBD. History Sydney's history begins in prehistoric times with the occupation of the district by Australian Aboriginals, whose ancestors came to Sydney in the Upper Paleolithic period. Radiocarbon dating suggests that they lived in and around Sydney for at least 30,000 years. Sydney Cove from Port Jackson to Petersham was inhabited by the Cadigal clan. The principal language