Proclus of Constantinople was a 5th-century archbishop who led the see of Constantinople from 434 until his death in 446. A skilled rhetorician and orator, he served as a secretary to Archbishop Atticus before his own rise to leadership. He is most famously recognized for his influential role during the Nestorian controversy, where his preaching helped advance theological positions against Nestorius. Beyond his political and ecclesiastical influence, he is remembered as a significant Marian theologian for his sophisticated homilies regarding the Virgin Mary.