Saint Thomais was a 10th-century Byzantine woman from Lesbos who lived in Constantinople. Unlike many female saints of her era, she achieved sanctity as a married laywoman rather than through monastic life. She is remembered for her extreme piety and her dedication to aiding the poor, often giving away her own clothing or earnings. Throughout her thirteen-year marriage to a sailor named Stephen, she endured significant physical abuse, which eventually led to her death at the age of 38. She is venerated in the Eastern Orthodox Church as a miracle-worker.