Saint Ursula is a legendary Romano-British Christian saint, died on 21 October 383. Her feast day in the pre-1970 General Roman Calendar is 21 October. There is little definite information about her and the anonymous group of holy virgins who accompanied her and on some uncertain date were killed at Cologne. They remain in the Roman Martyrology, although their commemoration does not appear in the simplified Calendarium Romanum Generale of the 1970 Missale Romanum.
The earliest evidence of a cult of martyred virgins at Cologne is an inscription from c. 400 in the Church of St. Ursula, located on Ursulaplatz in Cologne which states that the ancient basilica had been restored on the site where some holy virgins were killed. The earliest source to name one of these virgins Ursula is from the 10th century.
Her legendary status comes from a medieval story that she was a princess who, at the request of her father King Dionotus of Dumnonia in south-west Britain, set sail along with 11,000 virginal handmaidens to join her future husband, the pagan governor Conan Meriadoc of Armorica.