Catherine of Alexandria

"Saint Catherine of Alexandria, also known as Saint Catherine of the Wheel and The Great Martyr Saint Catherine (Greek ἡ Ἁγία Αἰκατερίνη ἡ Μεγαλομάρτυς) is a Christian saint and martyr who is claimed to have been a noted scholar in the early 4th century. 1,100 years later, Joan of Arc said that Catherine appeared to her many times. The Orthodox Church venerates her as a "great martyr", and in the Catholic Church she is traditionally revered as one of the Fourteen Holy Helpers."- Wikipedia