Wearing a jewelled blue and white turban adorned with plumes, a green gown and yellow half sleeve, holding a scroll in her hands, oval 9cm, rectangular carved gilt-wood frame, the reverse inscribed: ‘copy’d at Rome in 1769 by Mme Maron Sister to Mr Mengs principal painter in Spain, from Guido’s Sybil in Mr. Wilbraham’s collection’.
Theresia Mengs was born in 1725 in Usti nad Labem and died in 1806 in Rome. She and her brother, the artist Anton Raphael Mengs, were pupils of their father Ismael, who was court painter to the Elector of Saxony. She worked for a short time at the court in Dresden before moving to Rome where she became a successful painter of portraits and miniatures in pastel, gouache and enamel. She married Anton Maron, a fellow artist in 1765.