Polyeuktus, patriarch, [230]
Ravenna, taken by Belisarius, [91];
exarchate of, [119];
occupied by the Lombards, [196]
Rhangabe, Michael, short reign of, [204]
Rhazates, general, slain by Heraclius, [137]
Richard Coeur de Leon, conquers Cyprus, [278]
Robert Guiscard, wars of with Alexius I., [259-60];
final repulse of, [261]
Roger de Flor, hired by Andronicus II., [317];