Holy Monastic Martyrs of the Iviron Monastery, drowned for refusing the Latin union.
In the late thirteenth century, when the Emperor Michael VIII sought to impose the union with Rome, the monks of Iviron on Mount Athos refused to accept it. Tradition relates that the elder monks were put aboard a ship and drowned in the sea, while the younger were carried off into captivity.
They are honored among the Athonite martyrs for Orthodoxy.
Feast day
On the New Calendar, Monastic Martyrs of Iviron is commemorated on May 13. Churches on the Old (Julian) Calendar keep the feast on May 26 of the civil calendar.
Also commemorated on May 13

Sergios the Confessor
Venerable, Σέργιος ο Ομολογητής
Venerable Sergios the Confessor, who suffered exile for the holy icons.
Founders of Iviron: John, Euthymios, George and Gabriel
Venerable, Ιωάννης, Ευθύμιος, Γεώργιος και Γαβριήλ οι Ίβηρες
Venerable John, Euthymios, George and Gabriel the Iberians, founders and fathers of the Iviron Monastery on Mount Athos.
Laodikios the Jailer
Martyr, Λαοδίκιος
Holy Martyr Laodikios, the jailer converted by Saint Glykeria.
Name days: Laodikios
Pausikakos of Synnada
Hierarch, Παυσίκακος Συνάδων
Saint Pausikakos, Bishop of Synnada, physician and wonderworker.
Name days: Pafsikakos, Pausicacus