Boris I of Bulgaria (Died 907) was born into a time when Bulgaria was one of the most dominant countries in Europe with a territory encompassing modern day Bulgaria, Macedonia, Serbia, Hungary, Romania and Albania. Possibly due to a vision or for shrewd political reasons, King Boris converted to Christianity.
Eventually he grew tired of ruling and abdicated to become a monk. His son Vladimir became King and reintroduced paganism to Bulgaria and made some bad political decisions. Boris was having none of it, came back out of retirement, blinded and imprisoned Vladimir and appointed his other son Simeon as the new ruler. It was a wise choice: Simeon would lead Bulgaria into what is now known as the Golden Age of Bulgarian culture.
We are not responsible for the contents of external links. Full disclaimer can be found here.
Photo Credits / Sources:
By Todor Bozhinov (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 4.0-3.0-2.5-2.0-1.0 (http://creativecommons.org/licenses/by-sa/4.0-3.0-2.5-2.0-1.0)], via Wikimedia Commons