While the later Stalinist period was characterized by the curtailing of creativity and architectural innovation, the earlier post-revolutionary years saw a plethora of radical new buildings created in the city. Especially notable were the constructivist architects associated with VKHUTEMAS, responsible for such landmarks as Lenin's Mausoleum. Another prominent architect was Vladimir Shukhov, famous for Shukhov Tower, just one of many hyperboloid towers designed by Shukhov. It was built between 1919 and 1922 as a transmission tower for a Russian broadcasting company. Shukhov also left a lasting legacy to the Constructivist architecture of early Soviet Russia. He designed spacious elongated shop galleries, most notably the GUM department store on Red Square, bridged with innovative metal-and-glass vaults.