Asta Bidspirit | 7 black marble and giallo

7 black marble and giallo di Siena medallions - with the profiles of Cleobulo, Periandro, Quintilio, Biante Pireneo, Socrate, Sigismondo and a Roman emperor, 18th century, Rome, 6 plaques 16cm. diam. each, one plaque 13by9,5cm.