 The productivist majority gained the support of the Proletkult and the magazine LEF, and later became the dominant influence of the architectural group O.S.A.The first and most famous Constructivist architectural project was the 1919 proposal for the headquarters of the Comintern in St Petersburg by the Futurist Vladimir Tatlin, often called Tatlin's Tower.Though it remained unbuilt, the materials—glass and steel—and its futuristic ethos and political slant (the movements of its internal volumes were meant to symbolise revolution and the dialectic) set the tone for the projects of the 1920s.