None of these original acts of union can at present be produced. Of the ten MSS. that are preserved, (five at Rome, and the remainder at Florence, Bologna, Venice, Paris, and London), nine have been examined by an accurate critic (M. de Brequigny), who condemns them for the variety and imperfections of the Greek signatures. Yet several of these may be esteemed as authentic copies, which were subscribed at Florence, before (26th of August, 1439) the final separation of the pope and emperor (Memoires de l'Academie des Inscriptions, tom. xliii. p. 287 -311).