Renunciation and Monastic Life
Oleg Romanovich belonged to the line of the princes of Chernigov and Briansk. In 1274 he joined his father, Prince Roman Mikhailovich, in a war against Lithuania. Following this campaign he gave up his princely position to embrace the monastic life.
He entered the monastery of Saints Peter and Paul in Briansk, a community he had himself funded. Receiving the monastic name Basil, he lived there as a strict ascetic until his repose in 1285, and was buried in the monastery church.
Family and Lineage
Saint Oleg stood in a three-generation princely line of the Olgovichi clan. His grandfather was Saint Michael of Chernigov (c. 1185–1246), Grand Prince of Kiev and Prince of Chernigov, who was executed on the order of Batu Khan in 1246 for refusing to perform pagan obeisance at the shrine of Chingis Khan, considering it incompatible with the Christian faith.
His father was Prince Roman Mikhailovich the Old (c. 1218 – after 1288), Prince of Briansk. Oleg's siblings included Mikhail Romanovich and a sister, Olga (also called Elena) Romanovna, who married Prince Vsevolod Vasilkovich of Volhynia.
Sources and Veneration
The saint is relatively obscure outside Russian-language sources, and the OCA synaxarion is the primary accessible English-language account of his life. No dedicated article appears on OrthodoxWiki, and there is no English Wikipedia article under the title Oleg Romanovich of Bryansk.
The OCA identifies him as a saint but records no specific date of formal glorification or canonization proceedings, and provides no information about the present location or status of his relics. He is listed in the OCA calendar for September 20 as a distinct commemoration alongside the Afterfeast of the Elevation of the Cross, Greatmartyr Eustathios Placidas, the martyrs Michael and Theodore of Chernigov, and the monastic-martyr Hilarion of Mount Athos.