The twenty-eighth day of October.
- 312: Battle of Milvian Bridge. Constantine the Great sees an omen in the sky: the Greek letters "Chi" and "Rho" (the first two letters of "Christ") and the inscription "in hoc signo vinces" (with this sign, you will conquer).
- 1943: Weizsacker, the German Ambassador to the Vatican, telegrammed Berlin that Pope Pius XII "has not allowed himself to be carried away [into] making any demonstrative statements against the deportation of the Jews."
- 1958: Angelo Giuseppe Roncalli, Patriarch of Venice, is elected as Pope John XIII. He succeeds Pope Pius XII.
- 1967: Pope Paul VI and Patriarch Athenagoras I of Constantinople sign a joint declaration calling for cooperation between the Roman Catholic and Eastern Orthodox churches.
- Arsenius of Srem, Archbishop of Serbia
- Athanasius I, Patriarch of Constantinople
- Dorbheneus, Abbot of Iona
- Eadsin, Archbishop of Canterbury, England, Who Crowned King Edward the Confessor
- Great-martyr Paraskeva of Iconium
- Martyrs Terence and Neoilla and their children
- New-Martyrs Angelis, Manuel, George and Nicholas of Crete
- Venerable Job of Pochayiv
- Venerable Stephen of Mar Sabbas monastery in Palestine
- Discovery of the Holy Cross (Armenian Apostolic Church)