I have been making domes for many years, and I know a little about domes. Please add anything wrong. I think the dome can be roughly divided into several stages: 1. China people are the ancestors of the vault. The vault can be seen in the tombs of Han Dynasty and Liao Dynasty, but it is buried underground and has a small diameter (this can be found in Baidu pictures). 2. During the Renaissance, the domes of European cathedrals were also made of bricks, but they used lead skin and copper plates as their outer surfaces. Compared with the underground dome technology in ancient China, their ground dome technology makes the dome bigger, more artistic in shape and more beautiful in painting. 3, the invention of cement, with concrete, concrete thin shell technology, the dome made by this technology, the outer surface of the dome is usually inlaid with stone (the outer surface of the white dome of Abu Dhabi Mosque is concrete inlaid with white marble), or it can be metal. 4. Modern grid structure, tension-bending steel tube structure and steel curved beam dome. The focus is on article 5. Now the hyperboloid steel arch dome we are making is made of 3mm q235b steel plate with a diameter less than 5m and 4mm q235b steel plate with a diameter greater than 05m by stamping. It has the characteristics of light load, safe and reliable structure, beautiful appearance and strong durability, and is the best structural form so far. Each period has different structural forms, let alone who to imitate.

The question you should ask is, why is the dome round? It's because our sky is round, and the dome is used as a tomb for the people below to live under the blue sky. Domes are used in churches because God is in the sky, the sky is round, and God is in the church, so the domes of churches are mostly round. Of course, they are also related to the science of cyclic stress. Only the dome shape can build a large building structure system, so the top is round.