Which contributor to Padrón Real was the first to demonstrate that Columbus' conjecture about Asia's eastern outskirts was wrong?
Padrón Real The Padrón Real (] , "Royal Register"), known after 2 August 1527 as the Padrón General (] , "General Register"), was the official and secret Spanish master map used as a template for the maps present on all Spanish ships during the 16th century. It was kept in Seville, Spain by the Casa de Contratación. Ship pilots were required to use a copy of the official government chart, or risk the penalty of a 50 doblas fine. The map probably included a large-scale chart that hung on the wall of the old Alcazar in Seville. Well known official cartographers and pilots who contributed to and used the map included Amerigo Vespucci, Diogo Ribeiro, Sebastian Cabot, Alonzo de Santa Cruz, and Juan Lopez de Velasco.
Heliodorus (philosopher) Heliodorus (Greek: Ἡλιόδωρος ) is cited as the author of a work titled "Commentary" (dated 564 AD), which has been preserved, on the "Introduction" or "Rudiments" of Paulus Alexandrinus, the 4th century Alexandrian astrologer. The name "Heliodorus" appears only on the later of two groups of manuscripts, and so is somewhat doubtful. Leendert Westerink has argued that the commentary consists of notes of lectures, most likely given by the 6th-century philosopher and astrologer, Olympiodorus, in 564 AD. The Greek text of his commentary on Aristotle's "Nicomachean Ethics" has been published in vol. 19.2 of "Commentaria in Aristotelem Graeca" (CAG).