Gazzetted as a National Monument on 14 February 1992.
For over a century this neo-Palladian building was used as government offices. The central portion was built 1864-65 in anticipation of Singapore's transfer of rule from India to the Colonial Office. Subsequent additions were faithful to the original design. Vacated in the mid-1980s, it underwent major restoration work in order to house the Asian Civilisations Museum.