The Russian language is written with the Cyrillic script, which was developed in Medieval Bulgaria based on the Greek script used at the time in the Byzantine Empire. In fact, the name "Cyrillic" comes from the name of a Byzantine monk: Saint Cyrill.
The Cyrillic script is also used in Ukraine, Serbia, Bulgaria, and Belarus.
<span>The fact that they couldnt control all of the people and land conquered by Caesar led to a decentralization in power and feudal lords came about.</span>