John Chrysostom (c. 347–407) was an Archbishop of Constantinople and an important Early Church Father. He is known for his powerful and persuasive words in preaching and public speaking. After his death in 407 C.E., he was given the Greek title "chrysostomos", meaning "golden mouthed" in English.
The Orthodox and Eastern Catholic Churches see him as a saint. He is also recognized by the Eastern Orthodox Church and the Catholic Church as a saint. Western Churches, including the Roman Catholic Church, some Anglican Churches, and parts of the Lutheran Church, celebrate him by making 13 September a holiday. They also celebrate an Eastern feast day of 27 January. The Coptic Orthodox Church of Alexandria also recognizes John Chrysostom as a saint.
John is known mainly as a preacher in Christianity, as well as a theologian and liturgist.