Italian Paintings of the Sixteenth Century: Emilia di Spilimbergo, c. 1560 | National Gallery of Art https://www.nga.gov/research/publications/italian-paintings-sixteenth-century-0/italian-paintings-sixteenth-century-emilia-di-spilimbergo-c-1560
prospective husbands; or, given their character as balancing pendants, as permanent souvenirs