 The centre wing, which was erected on poor foundations, was demolished in 1879 and the replacement building, the Sydney Hospital, was finished in 1894.As part of Sydney's oldest remaining complex of public buildings, Parliament House has been at the centre of the history of New South Wales and continues to play a key role in the history of New South Wales as the seat of government today.Parliament House, Sydney was listed on the New South Wales State Heritage Register on 19 April 2002 having satisfied the following criteria.