Rome, Propaganda Printing House, 1788. 3 Vol. In 4 °. & Nbsp; Frontispieces with copper vignette engraved by Giacomo Bossi, with portrait of Pope Pius VI engraved in copper by Ronconi and portrait of the author engraved by Carattoni, 6 initials with vignette engraved in copper, copper heads and ends, some papers with slight bluing, at vol. 1 the first issue is slightly loosened and a slight stream of water becomes more intense in the last issues, contemporary Rococo-style Moroccan bindings, plates framed by & nbsp; beautiful double frames with weaves and borders with small irons, in the center & nbsp; & nbsp; arms of a knight member of the order of Malta, back with five nerves, gold title within a gusset, compartments with flowers and garlands, gilded cuts, slight defects.