Traditional birthplace at Drepanon
· Drepanon (Helenopolis), Bithynia, Roman Empire (near Hersek, Yalova Province, Türkiye)
Helena is traditionally placed at Drepanon in Bithynia, later called Helenopolis. The exact year and even the identification of the birthplace remain uncertain. Wikipedia dates her birth c. AD 246–248 and emphasizes that the birthplace is not certain; coordinates represent identified ancient Helenopolis/Hersek.
