The Karasids or Karasid dynasty (Ottoman Turkish: قرا صي; Turkish: Karesioğulları Beyliği), also known as the Principality of Karasi and Beylik of Karasi...

as the "Conqueror of Rumelia". He conquered Iznik (Nicaea) in 1331, Karesioğulları in 1335, and Izmit (Nicomedia) in 1337. His father appointed him governor...