Margaret, known as Margaret of Antioch in the West, and as Saint Marina the Great Martyr (Greek: Ἁγία Μαρίνα) in the East, is celebrated as a saint on 20 July in Western Christianity, on 30th of July (Julian calendar) by the Eastern Orthodox Church, and on Epip 23 and Hathor 23 in the Coptic Orthodox Church.

She was reputed to have promised very powerful indulgences to those who wrote or read her life, or invoked her intercessions; these no doubt helped the spread of her following.^[2]

Margaret is one of the Fourteen Holy Helpers, and is one of the saints Joan of Arc claimed to have spoken with.

According to a 9th-century martyrology of Rabanus Maurus, she suffered at Antioch in Pisidia (in what is now Turkey) in around 304, during the Diocletianic persecution. She was the daughter of a pagan priest named Aedesius. Her mother having died soon after her birth, Margaret was nursed by a Christian woman five or six leagues (15 to 18 miles (24 to 29 km)) from Antioch. Having embraced Christianity and consecrated her virginity to God, Margaret was disowned by her father, adopted by her nurse, and lived in the country keeping sheep with her foster mother.^[3][4] Olybrius, Governor of the Roman Diocese of the East, asked to marry her, but with the demand that she renounce Christianity. Upon her refusal, she was cruelly tortured, during which various miraculous incidents are reported to have occurred. One of these involved being swallowed by Satan in the shape of a dragon, from which she escaped alive when the cross she carried irritated the dragon's innards. Eventually, she was decapitated.

According to the Encyclopædia Britannica, Margaret's story is "generally regarded to be fictitious".^[4][5] The Catholic Encyclopedia states that "even the century to which she belonged is uncertain".^[6]

Doubts about her story are not new: already in the Middle Ages, hagiographer Jacobus de Voragine (author of the well-known Golden Legend) considered her martyrology to be too fantastic and remarked that the part where she is eaten by the dragon was to be considered a legend.^[7]

The Greek Marina came from Antioch in Pisidia (as opposed to Antioch of Syria), but this distinction was lost in the West. From the east her veneration spread towards England, France, and Germany, in the eleventh century, during the Crusades.

In 1222, the Council of Oxford added her to the list of feast days, and so her cult acquired great popularity. Many versions of the story were told in 13th-century England, in Anglo-Norman (including one ascribed to Nicholas Bozon), English, and Latin,^[8] and more than 250 churches are dedicated to her in England, most famously, St. Margaret's, Westminster, the parish church^[9] of the British Houses of Parliament in London.^[4] There is also a Saint Margaret Shrine in Bridgeport, Connecticut in the United States.

In art, she is often represented as a shepherdess, or pictured escaping from, or standing above, a dragon. While Western iconography typically depicts St. Margaret emerging from the dragon, Eastern Byzantine iconography tends to focus on her battle with the demon in her cell and depicts her grabbing him by his hair and swinging a copper hammer at his face.^[15]

• Saint Marina the Monk and Saint Pelagia, both of whom are sometimes conflated or confused with Margaret