From Boissevain’s Vitae et icones svltanorvm tvrcicorum, principvm persarvm aliorumq illustrium heroum heroinarumq ab Osmane usq ad Mahometem II, published in 1596 in Frankfurt am Main, this engraving is a portrait of sultane Medabe. The engraving was made by Theodore de Bry (1528-1598) and is now in the Rijksmuseum Amsterdam [1, 2]. The portrait is in a frame with by vines, snails and birds.
The snails are symmetrically placed in the left and right border. One is sinistral, the other one dextral. Both have enlarged apertures; the animals are figured from the back, but all tentacles are shown.