Kew Lunatic Asylum is a decommissioned heritage-listed psychiatric hospital located between Princess Street and Yarra Boulevard in Kew, a suburb of Melbourne, Australia. Operational from 1871 to 1988, Kew Asylum was one of the largest asylums ever built in Australia. Later known as Willsmere, the complex of buildings were constructed between 1864 and 1872 to the design of architects G.W. Vivian and Frederick Kawerau of the Victorian Public Works Office to house the growing number of "lunatics", "inebriates", and "idiots" in the Colony of Victoria.