Hello @storiesoferne! I really did not expect to see such an amazing temple in the village. I also wondered how true the theory of adding a chicken egg in construction is. At that time, lime mortar was often used in construction. It turns out that egg white slowly releases hydrogen sulfide and carbon dioxide when broken down. Without carbon dioxide, lime mortar "cements" (hardens) only on the surface. Due to the fact that the eggs were mixed with the solution, the release of carbon dioxide and hydrogen sulfide occurred in all areas of the lime mortar. Thus, all this lime mortar slowly turned into a monolith. There was a kind of chemical reaction. It is believed that buildings of this composition are durable and are not afraid of temperature changes. Quite an interesting solution, isn't it?
I also heard such a version that sometimes eggs were added for religious reasons. The egg in religion is a symbol of the birth of a new life and the personification of the universe. But I'm not sure about this theory.