100 - 170
Claudius Ptolemy (; Greek: Πτολεμαῖος, Ptolemaios; Latin: Claudius Ptolemaeus; c. 100 – c. 170 AD) was a Roman mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importance to later Byzantine, Islamic, and Western European science. The first is the astronomical treatise now known as the Almagest, although it was originally entitled the Mathēmatikē Syntaxis or Mathematical Treatise, and later known as The Greatest Treatise. The second is the Geography, which is a thorough discussion on maps and the geographic knowledge of the Greco-Roman world. Read more on Wikipedia
Since 2007, the English Wikipedia page of Ptolemy has received more than 4,794,965 page views. His biography is available in 115 different languages on Wikipedia (up from 109 in 2019). Ptolemy is the 4th most popular astronomer, the 4th most popular biography from Egypt and the most popular Egyptian Astronomer.
Ptolemy is most famous for his geocentric model of the universe, which he proposed in his book, "Almagest." In this model, the earth is at the center of the universe and all other celestial bodies orbit around it.
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Among astronomers, Ptolemy ranks 4 out of 531. Before him are Galileo Galilei, Nicolaus Copernicus, and Johannes Kepler. After him are Giordano Bruno, Tycho Brahe, Anders Celsius, William Herschel, Aristarchus of Samos, Edwin Hubble, Ulugh Beg, and Hipparchus.
1564 - 1642
HPI: 94.55
Rank: 1
1473 - 1543
HPI: 91.59
Rank: 2
1571 - 1630
HPI: 87.17
Rank: 3
100 - 170
HPI: 85.61
Rank: 4
1548 - 1600
HPI: 85.43
Rank: 5
1546 - 1601
HPI: 79.61
Rank: 6
1701 - 1744
HPI: 79.08
Rank: 7
1738 - 1822
HPI: 75.68
Rank: 8
311 BC - 230 BC
HPI: 75.56
Rank: 9
1889 - 1953
HPI: 75.32
Rank: 10
1394 - 1449
HPI: 74.68
Rank: 11
190 BC - 120 BC
HPI: 74.29
Rank: 12
Among people born in 100, Ptolemy ranks 1. After him are Pope Alexander I, Joseph of Arimathea, Longinus, Dionysius the Areopagite, Thecla, James the Less, Decebalus, Pope Telesphorus, Pope Hyginus, Saint Sarah, and Pope Victor I. Among people deceased in 170, Ptolemy ranks 1. After him are Apuleius, Salvius Julianus, and Junius Rusticus.
100 - 170
HPI: 85.61
Rank: 1
100 - 116
HPI: 72.19
Rank: 2
100 - 96
HPI: 71.81
Rank: 3
100 - 100
HPI: 70.76
Rank: 4
100 - 100
HPI: 69.54
Rank: 5
100 - 100
HPI: 68.91
Rank: 6
100 - 62
HPI: 68.81
Rank: 7
100 - 106
HPI: 68.45
Rank: 8
100 - 137
HPI: 67.82
Rank: 9
100 - 142
HPI: 67.65
Rank: 10
100 - 100
HPI: 67.28
Rank: 11
100 - 199
HPI: 66.41
Rank: 12
100 - 170
HPI: 85.61
Rank: 1
125 - 170
HPI: 75.60
Rank: 2
115 - 170
HPI: 59.33
Rank: 3
100 - 170
HPI: 51.34
Rank: 4
Among people born in Egypt, Ptolemy ranks 4 out of 582. Before him are Moses (-1393), Cleopatra (-69), and Tutankhamun (-1341). After him are Nefertiti (-1400), Akhenaten (-1400), Euclid (-350), Hypatia (350), Yasser Arafat (1929), Hatshepsut (-1507), Catherine of Alexandria (287), and Joshua (-1355).
1393 BC - 1273 BC
HPI: 92.96
Rank: 1
69 BC - 30 BC
HPI: 89.95
Rank: 2
1341 BC - 1323 BC
HPI: 86.63
Rank: 3
100 - 170
HPI: 85.61
Rank: 4
1400 BC - 1330 BC
HPI: 85.45
Rank: 5
1400 BC - 1336 BC
HPI: 84.67
Rank: 6
350 BC - 240 BC
HPI: 83.48
Rank: 7
350 - 415
HPI: 81.91
Rank: 8
1929 - 2004
HPI: 80.84
Rank: 9
1507 BC - 1458 BC
HPI: 80.70
Rank: 10
287 - 305
HPI: 80.46
Rank: 11
1355 BC - 1245 BC
HPI: 80.40
Rank: 12
Among astronomers born in Egypt, Ptolemy ranks 1. After him are Sosigenes of Alexandria (-80) and Timocharis (-320).
100 - 170
HPI: 85.61
Rank: 1
80 BC - 100 BC
HPI: 61.98
Rank: 2
320 BC - 260 BC
HPI: 53.54
Rank: 3