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]]
Ancient Egyptian race controversy may have been part Syrian, in line with the precedent of Persian and Syrian blood in the Ptolemaic line, continuing that Cleopatra "almost certainly had olive skin and dark eyes." Michael Grant also argues that Cleopatra's paternal grandmother may have been mixed Syrian and Greek, continuing that "certainly she was not an Egyptian," noting there is only one known Egyptian mistress of a Ptolemy and no known Egyptian wife of a Ptolemaic king. He goes on to say Cleopatra probably had not a drop of Egyptian blood and that she "would have described herself as Greek," adding that if Cleopatra