Holy King John Vladimir of Serbia, wonderworker, beheaded by treachery.
John Vladimir ruled the Serbian land of Zeta (Duklja) at the turn of the eleventh century and was known for his piety and justice. Captured by Tsar Samuel of Bulgaria, he married the Tsar's daughter Kosara and was restored to his throne.
He was treacherously beheaded in 1016 by Samuel's successor. His relics are venerated near Elbasan in Albania and he is honored throughout the Balkans.
Feast day
On the New Calendar, John Vladimir of Serbia is commemorated on May 22. Churches on the Old (Julian) Calendar keep the feast on June 4 of the civil calendar.
Also commemorated on May 22

Fathers of the Second Ecumenical Council
Saint, Πατέρες της Β' Οικουμενικής Συνόδου
Commemoration of the Holy Fathers of the Second Ecumenical Council at Constantinople.
Paul the Peloponnesian
Martyr, Παύλος ο Πελοποννήσιος
Venerable Martyr Paul of Aroania, an Athonite monk beheaded at Tripolis.
Sophia the Physician
Holy Woman, Σοφία η Ιατρός
Venerable Sophia the Physician, who healed the sick and served the poor.
Zacharias of Prousa
Hierarch, Ζαχαρίας ο Νέος Προύσης
Hieromartyr Zacharias the New of Prousa, a priest beheaded for returning to Christ.