The "falling asleep" and assumption of the Virgin Mary into heaven. Preceded by a two-week fast, this feast on August 15th celebrates Mary's death and her bodily assumption. Orthodox theology teaches that Mary experienced death but was immediately raised and taken to heaven, where she intercedes for all Christians.

The miraculous image of Christ that appeared on cloth, also called the Mandylion. Celebrated on August 16th, this icon was sent by Christ himself to King Abgar of Edessa. According to tradition, Christ pressed a cloth to his face, leaving his image imprinted. This acheiropoietos (not-made-by-hands) icon represents Christ's divine nature and the power of his image.

The central worship service of the Orthodox Church, celebrating the Eucharist (Holy Communion). Usually celebrated on Sundays and feast days, the Divine Liturgy consists of the Liturgy of the Word (scripture readings) and Liturgy of the Faithful (Eucharistic prayer and communion). The most common forms are the Liturgies of St. John Chrysostom and St. Basil the Great.