Having visited the efforts of scholars to survey the domains of Dante Alighieri’s Divine Comedy beforehand, we enjoyed coming back to the endeavour to map Purgatory, the Inferno and Paradise with the culmination of seven centuries of study with the 1855 edition and 1872 reissue by Michelangelo Caetani, heir to the princedom of Teano, an academic and a patron of the arts with a special talent for draughting jewellery design and commissioned the monks of Monte Cassino to produce colour prints of his topological learning aides with an early form of chromolithography. Much more from Public Domain Review at the link above.