Gregory XVI, Bartolomeo Alberto Cappellari of Belluno. Pope from 1831 to 1846. Completion of the two tunnels for the deviation of the Aniene course in Tivoli. Extraordinary bronze medal 1835 (Year V). By Carl Heinrich Lorenz. (Bronze, 76.46 mm, 164.20 g). GREGORIVS XVI AVSV ROMANO SACRI PRINCIPATVS ANNO II INCHOAVIT V PERFECIT Panoramic view of the entrance to the two new tunnels of the Aniene at Monte Catillo; to right, along the outline, H LORENZ F. Rev. TIBVRTES CATILLO PERFORATO INDVCTO ANIENE SERVATI ANNO DOMINI MDCCCXXXV Panoramic waterfall view of the two new exit tunnels of the Aniene at Monte Catillo; upwards mountains and part of the city of Tivoli to right. Boccia 66. Patrignani 1929, 39. Martini 1998, 1215. Extremely Fine. Rare. Ex Tkalec, May 7, 2008 part II, lot 769.