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]]
Crisis of the Roman Republic to step onto Egyptian soil, he was treacherously struck down and killed by an officer of Ptolemy. Crisis of the Roman Republic The crisis of the Roman Republic refers to an extended period of political instability and social unrest that culminated in the demise of the Roman Republic and the advent of the Roman Empire, from about 134 BC to 44 BC. The exact dates of the Crisis are unclear because "Rome teetered between normality and crisis" for many decades. Likewise, the causes and attributes of the crisis changed throughout the decades, including the forms of slavery, brigandage, wars internal