Ptolemy or optical factors and those caused by judgmental factors. He offered an obscure explanation of the sun or moon illusion (the enlarged apparent size on the horizon) based on the difficulty of looking upwards. There are several characters or items named after Ptolemy, including: [[File:Ptolemaeus - Quadripartitum, 1622 - 4658973.tif|thumb|"Quadripartitum", 1622]] [[Category:Ptolemy| ]] [[Category:100 births]] [[Category:170 deaths]] [[Category:1st-century Romans]] [[Category:2nd-century Romans]] [[Category:2nd-century philosophers]] [[Category:2nd-century poets]] [[Category:Egyptian calendar]] [[Category:Ancient Greek astrologers]] [[Category:Ancient Greek astronomers]] [[Category:Ancient Greek mathematicians]] [[Category:Ancient Greek music theorists]] [[Category:Astrological writers]] [[Category:Claudii]] [[Category:Egyptian astronomers]] [[Category:Egyptian mathematicians]] [[Category:Epigrammatists of the Greek Anthology]] [[Category:2nd-century people of Roman Egypt]] [[Category:Ancient Greek geographers]]
Theodotus of Chios Marcus Junius Brutus or Gaius Cassius Longinus put him cruelly to death. The famous Roman rhetorician Quintilian tells that "a discussion with Caesar about the punishment of Theodotus" was a subject in rhetoric schools. Theodotus of Chios Theodotus of Chios (died in 43 BC or 42 BC) was the rhetoric tutor of the young Egyptian king Ptolemy XIII. Theodotus of Chios was a trained rhetorician and the tutor of Ptolemy XIII. He was one of the three influential men who led the guardianship for the young Egyptian king after the death of Ptolemy XII (spring of 51 BC). The most