From about 23 km (14 mi) south west of Kiev, Gediminas resoundingly defeated Stanislav of Kiev and his allies in the Battle on the Irpin River. He then besieged and conquered Kiev sending Stanislav, the last descendant of the Rurik Dynasty to ever rule Kiev, into exile first in Bryansk and then in Ryazan. Theodor, brother of Gediminas, and Algimantas, son of Mindaugas from the "Olshanski family", were installed in Kiev. After these conquests, Lithuania stretched as far as to the Black Sea.