GROK on the baptism of roman emperor constantine.

Yes, historical evidence suggests that Roman Emperor Constantine the Great was likely baptized by an Arian-leaning clergyman, Eusebius, bishop of Nicomedia, on his deathbed in 337 CE. Eusebius was a known supporter of Arianism, a theological position that viewed Jesus as subordinate to God the Father, which was deemed heretical at the Council of Nicaea in 325 CE, where Constantine had supported the orthodox Trinitarian view.However, the exact circumstances are debated. Some sources, like the 5th-century historian Socrates Scholasticus, confirm Eusebius of Nicomedia performed the baptism. Others, like Eusebius of Caesarea, a key biographer of

Constantine, are vague about the officiant’s identity. The choice of Eusebius of Nicomedia, an Arian, may reflect political or personal ties rather than Constantine’s theological stance, as he had previously backed the Nicene Creed but also sought to reconcile Arians and orthodox Christians for imperial unity.There’s no definitive evidence Constantine himself adopted Arian beliefs at the time of his baptism, but the involvement of an Arian-leaning bishop has fueled speculation about his late-life theological leanings.