Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Looking up: %D0%a2%d1%80%d1%83%d0%b4%d1%8b I %D0%92%d1%81%d0%b5%d1%80%d0%be%d1%81%d1%81%d0%b8%d0%b9%d1%81%d0%ba%d0%be%d0%b3%d0%be %D0%b6%d0%b5%d0%bd%d1%81%d0%ba%d0%be%d0%b3%d0%be %D1%81%d1%8a%d0%b5%d0%b7%d0%b4%d0%b0