Dome
A dome is a shell structure that looks like the hollow upper part of a sphere. There are different types of domes all over the world as far back as prehistoric times such as bee hive domes, geodesic dome, or onion domes. An igloo is an example of a dome in Canada. They have no angles or corners. Domes used to be made using arches but modern domes like geodesic domes are made from shapes like triangles.
Why it is important
They can cover a large amount of space without using columns to support the roof.