Athanasia of Egina was a 9th-century Byzantine abbess and saint who lived on the island of Aegina. Born to noble parents, she experienced a religious vision as a child that motivated her to pursue a monastic life, though her parents initially compelled her to marry twice. After her second husband also chose a religious path, she dedicated herself to asceticism, distributed her wealth to the poor, and established a convent. She served as an advisor to Empress Theodora II and was noted for her leadership and devotion to the Scriptures.