Saint Margaret the Virgin (1320–1329) attributed to Pietro Lorenzetti - Public Domain Catholic Painting

According to The Golden Legend, Margaret the Virgin was a native of Antioch and 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 (6.9–8.3 miles) 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 (in what is now Turkey). 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 occurred. She was martyred in 304 and she is celebrated as a saint in the Roman Catholic Church as well as the Orthodox, Coptic, and Anglican churches. One of the more fanciful Margaret legends involved her 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. Source

Pietro Lorenzetti (Italian pronunciation: [ˈpjɛːtro lorenˈtsetti]; c. 1280 – 1348) or Pietro Laurati was an Italian painter, active between c.1306 and 1345. Together with his younger brother Ambrogio, he introduced naturalism into Sienese art. In their artistry and experiments with three-dimensional and spatial arrangements, the brothers foreshadowed the art of the Renaissance. Source