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). It is now home to some 400,000 artefacts, 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.