What do you think could be the reason that many old buildings on Earth are sunk into the ground?

If this reason was significant, why is it not written about in the history books?

If this reason was hidden from people, can we then trust the story that is written for children in school textbooks?

Еight-pointed symbolism in the architecture of the Egyptian Ministry of Defense.

Central city power plant "Georgievskaya", 1888, architect V.D. Cher.

Link to building details (can be translated from Russian):

https://mosculture.ru/object/tsentralnaya-gorodskaya-elektrostantsiya-georgievskaya-1888-g-arhitektor-v-d-sher/

The building in Barnaul (Krasnoarmeysky Avenue, 14) officially was built in 1904-1905. But nobody explained why it is buried.

Unusual house, Moscow Ostozhenka 7/1. Look at doors in window’s places and disproportionate arch.

The main house of the Razumovsky-Sheremetev estate (also known as the wedding house) officially was built in the 1790s, the architect is not known, but N. Lvov is implied.