The Christmas Pyramid was one of the other things that never really caught on in North America as much as it did in Germany. Although there are some parts of the U.S. where they are quite popular. A neat little bit of science that added another dimension to the Christmas decorations in the house. If anyone remembers Christmas Vacation, this is what kept being knocked over and Clark kept trying to rebuild. Unfortunately I couldn't find a picture of it. But I had to get a shot of Eddie in here.
They say it was the predecessor to the Christmas tree. A kind of Carousel with 4 - 8 sides and anywhere from one to six or more tiers it has a propellor at the top. Each tier has a specific type of scene portrayed usually involving Christian motifs.
The neat thing is that they have candles at the bottom and the heat from them turns the blades of the fan at the top. This then moves all the levels of the carousel. A really cool bit of technology.
In some of the Christmas Markets they build them to over 45 feet. These Weihnachtspyramide are from Dresden and Aachen