. "Inscriptions on the back of this object indicate that it served as the repository for a relic believed to be a fragment of the True Cross and that it is thought to have been made for a convent of the Poor Clares, probably in Florence. It is an extraordinary example of Florentine Renaissance metalwork, incorporating within its silver-gilt frame a series of twenty silver plaques with nielloed scenes depicting the Passion of Christ and various saints."@en . . .