At 1,300 feet, this structure of iron, glass and steel would have dwarfed the Eiffel Tower. Designed in 1919 by Vladimir Tatlin, the building – officially called The Monument to the Third International – was planned to be erected in St. Petersburg as the headquarters of the Comintern. The tower was designed to contain twin spirals tapering upwards and encasing a cube-shaped lecture hall, a smaller pyramid for executive meetings, and a cylinder housing an information center, delivering bulletins and manifestos via radio, telegraph and loudspeaker.
Each part of the building would rotate at a different speed. The cube was proposed to rotate and complete 360˚ after 365 days, the pyramid would complete a full 360˚ rotation every month, and the cylinder would complete its rotation within 24 hours. There were also plans to build an open-air screen on the cylinder, and for the cylinder to project messages onto the clouds. The building was never constructed due to financing and structural concerns, though an interesting build effort took place in 2006.
There’s also this short film by Lutz Becker. The first YouTube comment below the video captures it perfectly: it’s “mad, impossible, brutal, audacious and beautiful.”