The Old Windmill

The Old Windmill is a heritage-listed tower mill located in Observatory Park adjacent to Wickham Park at 226 Wickham Terrace, Spring Hill, City of Brisbane, Queensland, Australia.

It was built in the 1820s by convict labour in the Moreton Bay penal settlement and is the oldest surviving building in Queensland. The Old Windmill is also known as Brisbane Observatory and Windmill Tower. Today, it is the centrepiece of Observatory Park and a lookout over parts of the Brisbane CBD.

The Old Windmill is a four-storey tower mill with four sails and two pairs of millstones. It was commissioned to grind local crops of corn and wheat to feed an increasingly self-sufficient penal colony. The mill also had a treadwheel as an auxiliary power source. The place is important in demonstrating the evolution or pattern of Queensland's history.

The Old Windmill Observatory is a small non-profit observatory located in Spring Hill, Queensland. It is the smallest of Australia's public observatories, covering an area of 29 square metres. The observatory is open to the public and offers a unique opportunity to view the night sky through a telescope.

Observatory Park, where The Old Windmill is located, is a serene park setting. The park offers a peaceful retreat from the hustle and bustle of the city and is a popular spot for picnics and relaxation. The park also has a playground for children and a basketball court.