Leo Tolstoy | Pope Leo XIII | São Tomé | Leo Gorcey | Leo Burnett | Leo Brouwer | Leo VI the Wise | Leo | São Tomé Island | Pope Leo X | Leo Durocher | Wadada Leo Smith | Ted Leo | Pope Leo I | Pope Leo IX | Melissa Leo | Leo Carrillo | Ted Leo and the Pharmacists | Leo Castelli | Leo Burnett Worldwide | San Leo | Leo Strauss | Leo Marks | Leo Laporte | Léo Ferré | Leó Szilárd | Leo Slezak | Leo Frobenius | Leo Cárdenas | Pope Leo XII |
Damian was very active in fighting views that he considered heretical, including not only tritheism, but also the Chalcedonians, Pope Leo's Tome, Bishop Julian of Halicarnassus, the Agnoetae, the Meletians, the Acephali, the Gaianites (supporters of a rival to Theodosius I), Stephen of Alexandria and Paul of Beth Ukame.