Set of twenty-four heads from 'The School of Athens'

A set of twenty-five prints reproducing the heads of some of the figures depicted in the fresco of The School of Athens, painted by Raphael in c.1509-10 in the Stanza della Segnatura in the Vatican. Each print is lettered along the bottom margin and numbered at top right. Probably from "Tetes choisies de personnages illustres..." published by Paolo Fidanza in Rome in 1785. 

Paolo Fidanza became famous for publishing six volumes of prints of heads after Raphael between 1757 and 1763.