Saint Mary (the Blessed Virgin) with the Christ Child, Saint Sixtus, Saint Barbara and angels. Engraving by A.T. Aikman after Raphael.

Licence: Public Domain Mark

Credit: Saint Mary (the Blessed Virgin) with the Christ Child, Saint Sixtus, Saint Barbara and angels. Engraving by A.T. Aikman after Raphael. Wellcome Collection. Source: Wellcome Collection.