A house of cards is a structure created by stacking playing cards on top of each other, often in the shape of a pyramid. "House of cards" is also an expression that dates back to 1645 meaning a structure or argument built on a shaky foundation or one that will collapse if a necessary element is removed. Structures built by layering in this way, such as Stonehenge, are referred to as "house of cards architecture", which dates back to the Cyclopean and Megalithic ages. The origin of the phrase is debated to be from the 18th century England but some believe that it has an American base.
