Vladimir Tatlin's Constructivist tower ‘The Monument to the Third International’ was to be erected in Moscow or St. Petersburg after the Bolshevik Revolution of 1917. (Model is shown in about the correct size at one of the proposed locations: home to Cathedral to Christ the Savior - Moscow based on http://www.youtube.com/watch?v=3P18XmwRKgM )
It was to be built from industrial materials: iron, glass and steel. In materials, shape, and function, it was envisioned as a towering symbol of modernity. It would have dwarfed the Eiffel Tower in Paris. The tower's main form was a twin helix which spiraled up to 400 m in height, which visitors would be transported around with the aid of various mechanical devices. The main framework would contain three enormous rotating geometric structures. At the base of the structure was a cube which was designed as a venue for lectures, conferences and congress meetings, and would complete a rotation in the span of one year. In the centre of the structure was a cone, housing executive activities and completing a rotation once a month. The topmost one, a cylinder, was to house an information centre, issuing news bulletins and manifestos via telegraph, radio and loudspeaker, and would complete a rotation once a day. There were also plans to install a gigantic open-air screen on the cylinder, and a further projector which would be able to cast messages across the clouds on any overcast day.