The architecture of Sydney, Australia’s oldest city, is not characterised by any one architectural style, but by an extensive juxtaposition of old and new architecture over the city's 200-year history, from its modest beginnings with local materials and lack of international funding to its present-day modernity with an expansive skyline of high rises and skyscrapers, dotted at street level with remnants of a Victorian era of prosperity.

The Hyde Park Barracks, Sydney is a heritage-listed former barracks, hospital, convict accommodation, mint and courthouse and now museum and cafe located at Macquarie Street in the Sydney central business district, in the City of Sydney local government area of New South Wales, Australia. Originally constructed between 1817 and 1819 as a brick building and compound to house convict men and boys, it was designed by convict architect Francis Greenway. It is also known as the Mint Building and Hyde Park Barracks Group and Rum Hospital; Royal Mint – Sydney Branch; Sydney Infirmary and Dispensary; Queen's Square Courts; Queen's Square. The site is managed by the Sydney Living Museums, an agency of the Government of New South Wales, as a living history museum open to the public.