Right-believing Great Prince Rostislav of Kiev and Smolensk.
St. Rostislav, baptized Michael, was Prince of Smolensk and later Great Prince of Kiev in the twelfth century. He founded the diocese of Smolensk, built churches, and was known for his justice, his love of peace among the quarreling princes, and his generosity to monasteries.
He reposed in 1167 on his way back to Kiev, and his memory is kept on March 14.
Feast day
On the New Calendar, Rostislav of Kiev is commemorated on March 14. Churches on the Old (Julian) Calendar keep the feast on March 27 of the civil calendar.
Also commemorated on March 14

Benedict of Nursia
Venerable, Βενέδικτος
Father of Western monasticism.
Name days: Venediktos, Benedict
Alexander of Pydna
Hierarch, Αλέξανδρος ο εν Πύδνη
Hieromartyr Alexander, priest of Pydna in Macedonia.
Theognostos of Kiev
Hierarch, Θεόγνωστος
Saint Theognostos the Greek, Metropolitan of Kiev and All Russia.