The avant-garde 1961 design of the five-floor concrete and glass Singapore Conference Hall was selected by open competition, and designated as a National Monument of Singapore in 2010.
Avant-garde architecture 28 December 2010 The design was selected from a nationwide open competition in 1961 and was a design of Singapore's urban architecture in the 1960s. 5 The original architecture primarily consisted of concrete and glass in its facade. 
