Set of two heads from ''The Liberation of St Peter'

A set of two prints reproducing the heads of two figures depicted in Raphael's fresco of 'The Mass at Bolsena', painted in the Stanza di Eliodoro in the Vatican with the collaboration of his workshop artists. Both prints are 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.