Cartaro first achieved distinction as a designer and engraver in Rome, where he issued a work containing the portraits of the first twenty-four Roman Emperors.[331] From Rome it appears that he went to Naples, where he continued to reside until the time of his death. That he was much favored in Naples is attested by the fact that he was given a commission to design or to represent all places and plants in the kingdom, and to receive for the same “ten scudi per month.”[332] It is probable that as a result of this commission we have that fine manuscript atlas of thirteen maps now belonging to the Biblioteca Nationale of Naples, representing the provinces of the kingdom and signed “M. Cartaro F. 1613.”[333] This manuscript gives striking evidence of his cartographical ability. The manuscript is of paper, its first map representing the ancient kingdom of Naples, on which is placed the Spanish coat of arms. The remaining twelve represent the following named provinces: Terra di Lavorro, Principato Citra, Principato Ultra, Basilicata, Calabria Citra, Calabria Ultra, Terra d’Otranto, Terra di Bari, Capitanata, Contado di Molise, Abruzzo Citra, Abruzzo Ultra. Cartaro’s globes are of solid wood about 16 cm. in diameter, the balls being covered with engraved gore maps. On his celestial globes appears the inscription, “Marius Cartarus Viterbensis Autor incidebat Romae cũ priv. 1577.” The twelve or rather twenty-four half gores, since they are cut on the line of the ecliptic, are copper engraved. The equator, the tropics, the polar circles, and the colures are represented, the ecliptic and the equator being graduated, the degrees being alternately colored red and yellow. The several constellations are well drawn, are colored yellow with shading, and stand out prominently against a blue background representing the sky. His terrestrial globes bear the inscription “Marius Cartarus Viterbensis Autor incidebat Romae MDLXXVII cum privilegio,” the gores being divided, as in the preceding, into twenty-four. Meridians and parallels are drawn at intervals of fifteen degrees, alternate degrees being colored red and yellow, the prime meridian passing through the Canary Islands and being graduated. In the Osservatorio del Collegio Romano may be found two copies of the celestial and one example of the terrestrial globe, one of the former once belonging to the astronomer, Virgilio Spada, and later to the Biblioteca Vallicelliana. Neither of these globes is well preserved, the original mountings are wanting, and each rests on a base of wood which has been merely designed to serve as a support.