January 15 - Eastern Orthodox liturgical calendar - January 17
Jacopo di Cione, Liberation of Saint Peter (1370–1371).
Liberation of St. Peter (by Bartolomé Esteban Murillo (1667))
Pope Marcellus I.
Icon of Saint Honoratus of Arles, founder of Lérins Monastery.
January 16 - Eastern Orthodox liturgical calendar - January 18
January 16 (Eastern Orthodox liturgics)
…January 15 - Eastern Orthodox liturgical calendar - January 17 All fixed commemorations below are observed on January 29 by Eastern Orthodox Churches on the Old Calendar…
Venerable Anthony the Great (16th-century icon)
Saint Sulpicius II Pius, Bishop of Bourges.
Saint Anthony the Roman of Novgorod, Abbot.
Maximus Confessor