Saint Catherine of Alexandria, or Saint Catharine of Alexandria, also known as Saint Catherine of the Wheel and The Great Martyr Saint Catherine (Greek: ἡ Ἁγία Αἰκατερίνα ἡ Μεγαλομάρτυς) is, according to tradition, a Christian saint and virgin, who was martyred in the early 4th century at the hands of the pagan emperor Maxentius. According to her hagiography, she was both a princess and a noted scholar, who became a Christian around the age of fourteen, converted hundreds of people to Christianity, and was martyred around the age of 18. More than 1,100 years following her martyrdom, Saint Joan of Arc identified Catherine as one of the Saints who appeared to her and counselled her.
The Eastern Orthodox Church venerates her as a Great Martyr and celebrates her feast day on 24 or 25 November (depending on the regional tradition). In Catholicism she is traditionally revered as one of the Fourteen Holy Helpers. In 1969 the Roman Catholic Church removed her feast day from the General Roman Calendar; however, she continued to be commemorated in the Roman Martyrology on 25 November. In 2002, her feast was restored to the General Roman Calendar as an optional memorial.
According to modern scholarship, the legend of Catherine was probably based on the life and murder of the Greek philosopher Hypatia (who was murdered by Christian fanatics), with reversed roles of Christians and pagans.