This Award-winning puzzle recreates Saint Petersburg’s world famous skyline, not only in three-dimension, the use of scale-model buildings, but in addition along the fourth dimension of time; spanning 300 years of architectural history. The puzzle includes 64 building replicas that depict Saint Petersburg’s Skyline as it seemed way back to 1703 through to 2008 with the completion of Business Center Benoit. The puzzle includes such iconic structures as the Peter and Paul Fortress, Summer Palace, and more than one Cathedrals and Churches that cover the Saint Petersburg city landscape.The base of the puzzle is a traditional 2D jigsaw puzzle that forms town’s street layout. Right through the method of constructing the base map, one learns about Saint Petersburg’s neighborhoods, streets, and more. Once the puzzle base is complete, the vertical building of Saint Petersburg’s Skyline begins by placing 64 buildings and skyscrapers in chronological time sequence. That is done by following the enclosed 4D Time Poster, which also details the completion date of every building. Ages 8+.Assembled Dimensions: 24″ L x 16″ W x 2″ H.