John Chrysostom was an early Christian bishop and theologian, born around 349 AD in Antioch, present-day Turkey. He is best known for his eloquent preaching and public speaking, earning him the nickname "Chrysostom," which means "golden-mouthed" in Greek. He became the Archbishop of Constantinople and was a prominent figure in the early Church, advocating for social justice and the poor. Chrysostom's writings include numerous homilies and letters that address various theological and moral issues. His teachings emphasized the importance of charity and the dangers of wealth. He faced political opposition and was exiled multiple times, ultimately dying in 407 AD. His legacy continues to influence Christian thought and liturgy.