Holy
Prince Oleg Romanovich of Briansk (in Baptism
Leontius) was grandson of the holy martyr Prince
Michael of Chernigov. According to the chronicle
histories, Prince Oleg together and his father,
Prince Roman Mikhailovich of Briansk, participated in
a war against Lithuania in 1274.
After 1274, he resigned as prince and became a monk with
the name Basil at the Briansk monastery of Sts Peter and
Paul, built through his generosity. The holy prince died
at this monastery as a strict ascetic in the year 1285,
and was buried in the monastery church.