Detail Portrait Constanza Caetani, pins, sewing needle and open thimble, 1480-1490, National Gallery, London https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-xaf1/v/t1.0-9/283860_458064614271779_1437169782_n.jpg?oh=c37a212b9285ae6207cf9a92a2e4e4ad&oe=54D247E4&__gda__=1426692661_9ec48935334dcaab4c825b7b57006aa8
eather thongs, found in European grave sites, are sewn into a circle. Bone rings are aligned and sewn into place like scales on the thong. As prayers are counted the rings are turned over. Still in use as late as the 19th century in Southern Germany. St Jerome is praying one of these rosaries in the painting, 'St Jerome in the Desert" by Bono da Ferrara c 1440.