In the bibliography, in the section 'Catalogus Auctorum', not only were the 33 cartographers mentioned whose work was recorded in the Theatrum (which at the time was not yet customary), but also the total of 87 cartographers of the 16th century that Ortelius knew. This list grew in every Latin Edition, and included no less than 183 names in 1601. Among the sources the following are mentioned: for the world map, the "World Map" (1561) by Giacomo Gastaldi; the "porto Avenue of the Atlantic coast" (1562) by Diego Gutierrez, the "world map" (1569) of Gerardus Mercator, which have eight maps derived from the Theatrum.