December 13 – Eastern Orthodox liturgical calendar – December 15
Church of St. Thyrsus (San Tirso) in Oviedo.
Saint Matronianus, with the Theotokos and Christ.
Martyrdom of St. Nicasius of Rheims.
Miniature of St. Venantius Fortunatus.
December 14 - Eastern Orthodox liturgical calendar - December 16
St. Eleutherius, Bishop of Illyria (Menologion of Basil II, 10th century)
Church of St. Mesmin, La Chapelle-Saint-Mesmin, Loiret, France.
St. Tryphon of Pechenga, Enlightener of the Lapps.
New Hieromartyr Hilarion (Troitsky), Archbishop of Verey.