Peter the Wonderworker, Metropolitan of Kiev and All Russia, first hierarch of Moscow.
Peter was a monk and iconographer of Volhynia who was made Metropolitan of Kiev and All Russia in the early fourteenth century. He transferred his residence to the rising city of Moscow, where he founded the cathedral of the Dormition, and reposed in peace in 1326. He is honoured as one of the great wonderworkers of Moscow.
Feast day
On the New Calendar, Peter of Moscow is commemorated on December 21. Churches on the Old (Julian) Calendar keep the feast on January 3 of the civil calendar.
Also commemorated on December 21

Themistocles of Myra
Martyr, Θεμιστοκλής
Holy Martyr Themistocles of Myra in Lycia.
Name days: Themistoklis, Themistocles, Themis
Five Hundred Martyrs and One Hundred Thirty Women of Nicomedia
Saint, Πεντακόσιοι Μάρτυρες και Εκατόν Τριάντα Γυναίκες
The five hundred men and one hundred thirty women martyred at Nicomedia with Saint Juliana.