St. Catherine of Alexandria is a Christian saint and martyr, celebrated for her intelligence and eloquence. According to tradition, she was born into a noble family in Alexandria, Egypt and became a scholar, converting to Christianity. She is known for her debates with pagan philosophers, which led to her imprisonment and eventual martyrdom around the early 4th century. Her feast day is observed on November 25, and she is often depicted with a wheel, symbolizing her torture. St. Catherine is the patron saint of philosophers, students, and unmarried women, and she is venerated in both the Eastern Orthodox and Roman Catholic traditions.