| 1 | The really important thing about Ptolemy's map was that north was at the top. | |
| 2 | But during the era of the Ptolemy' s, the role of Greek women had changed. | |
| 3 | Although it is not uncommon for people to say Copernicus proved Ptolemy wrong, that is not true. | |
| 4 | She married her younger brother, Ptolemy, and she became the mistress of the Roman general Julius Caesar. | |
| 5 | When, 18 years later, Lysimachus died, she married her half-brother, Ptolemy Keraunus. |
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