Professor Marian Karel proposed the installation of the Time Gate during the reconstruction and renovation of Cheb's pedestrian zone in 2009 and 2010. His artwork became part of the redevelopment concept. The monumental Time Gate represents a door leading into a now-demolished house that once stood on this site, where the medieval city of Cheb opened its gateway to the industrial age and the future. The artifact rotates imperceptibly on its own axis, completing a 180-degree turn every 24 hours. At midnight, it is in the "Closed" position. At noon, it is in the "Open" position. The sides of the artifact then connect with a timeline of key dates in Cheb's history. This timeline runs through the entire pedestrian zone, culminating in 2011, the year the city celebrated its 950th anniversary. The Time Gate is nine meters high, two meters wide, and weighs 3.5 tons.