The Holy Ten Thousand Fathers martyred in the desert of Nitria.
The Ten Thousand Fathers were monks of the Egyptian desert who were slain in the time of Patriarch Theophilos of Alexandria, who had them accused of Origenism. Tradition relates that they were killed by fire and sword in their monasteries.
They are commemorated as a company of holy ascetics who suffered unjustly.
Feast day
On the New Calendar, Ten Thousand Fathers of Nitria is commemorated on July 10. Churches on the Old (Julian) Calendar keep the feast on July 23 of the civil calendar.
Also commemorated on July 10

Anthony of the Kiev Caves
Venerable, Αντώνιος
Venerable Anthony of the Kiev Far Caves, founder of monasticism in Rus′ (†1073).

Forty-Five Holy Martyrs of Nicopolis
Martyr, Μάρτυρες
The Forty-Five Holy Martyrs of Nicopolis in Armenia, martyred under Licinius (c. 319).
Apollonios of Sardis
Martyr, Απολλώνιος Σάρδεων
Holy Martyr Apollonios of Sardis, crucified for Christ.
Parthenios and Eumenios of Koudoumas
Venerable, Παρθένιος και Ευμένιος
Venerable Parthenios and Eumenios, founders of the Koudoumas Monastery in Crete.
Synaxis of the Saints of Vatopedi
Saint, Σύναξις Βατοπαιδινών Αγίων
Synaxis of all the Saints of the Holy Monastery of Vatopedi on Mount Athos.