Roman Olgovich of Ryazan

Roman Olgovich (1237–19 July 1270) was grand prince of Ryazan from 1258, only son of Oleg the Red. He inherited a principality recovering from the Mongol sack and for twelve years complied with the Horde to keep it from ruin.

A tax collector slandered him to Khan Mengu-Timur, who summoned him in 1270 and offered death or conversion. Roman refused, was tortured and mutilated, then executed, and is venerated as an Orthodox martyr. Before leaving he divided his lands among his sons, including Konstantin.