January 1 - Eastern Orthodox liturgical calendar - January 3
Saint Sylvester, Pope of Rome, and the Emperor Constantine the Great.
Adoration of the Cross by Pope St. Sylvester I, Empress Helena and Emperor Constantine.
Martyr Basil of Ancyra (Menologion of Basil II, 10th century).
Relics of Saint Martinianus of Milan, in the Cathedral of Milan.
August 15 - Eastern Orthodox liturgical calendar - August 17
King Abgar with the Image of Edessa (St Catherine's monastery, Mount Sinai.)
Saint Diomedes, fresco at Hilandar Monastery, Mt. Athos.
Reliquary of Saint Simplician.
Portrayal of King Stephen I on the Hungarian coronation pall from 1031.