Structuralism is a type of architecture that focuses on how a building's pieces fit together to create a strong structure. It uses different materials, such as steel and concrete, and different shapes, like circles and curves, to make sure that the building is sturdy and will not collapse. The idea is that if the pieces are put together in the right way, it will make the building last longer and be more secure. Structuralism has been used in lots of different styles of architecture over the years, so you might have seen it in action without even knowing it!