The Powerhouse Museum is the major branch of the Museum of Applied Arts & Sciences (MAAS) in Sydney, and owned by the New South Wales State Government
The Powerhouse is a collection of museums with its main centre in Ultimo, New South Wales, the others being the historic Sydney Observatory at Observatory Hill, and the newer Museums Discovery Centre at Castle Hill and at Parramatta.
Although often described as a science museum, the Powerhouse has a diverse collection encompassing all sorts of technology including decorative arts, science, communication, transport, costume, furniture, media, computer technology, space technology and steam engines.
The museum has existed in various guises for over 125 years, previously named the Technological, Industrial and Sanitary Museum of New South Wales (1879–1882) and the Technological Museum (August 1893 – March 1988). the collection contains over 500,000 objects collected over the last 135 years,many of which are displayed or housed at the site it has occupied since 1988, and for which it is named – a converted electric tram power station in the Inner West suburb of Ultimo, originally constructed in 1902 and is a well-known and popular Sydney tourist destination. The Federation-style building is listed on the New South Wales Government's State Heritage Register.
The current building, designed by Lionel Glendenning for the Australian Bicentenary in 1988, won the Sir John Sulman Medal for architecture. It includes a specially installed reticulated steam system, run from the old boiler house, to drive the large, rare steam machines in its collection.
The Powerhouse Museum has its origins in a recommendation of the trustees of the Australian Museum in 1878 and the Sydney International Exhibition of 1879 and Melbourne International Exhibition of 1880. The Sydney International Exhibition was held in the Garden Palace, a purpose-built exhibition building located in the grounds of the Royal Botanic Gardens.