Ptolemy (85 - 165) - Biography - MacTutor History of Mathematics

Ptolemy was the most influential of Greek astronomers and geographers of his time. He propounded the geocentric theory of the solar system that prevailed for 1400 years.

MYSTERIES OF THE EQUILATERAL TRIANGLE - HIKARI Ltd

Ptolemy, Accomplishments, Biography, & Facts

History of mathematics - Wikipedia

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Pictures of Ptolemy - MacTutor History of Mathematics

Regiomontanus (1436 - 1476) - Biography - MacTutor History of Mathematics

Early Proofs of the Pythagorean Theorem by Leonardo Da Vinci, Ptolemy, Thabit ibn Qurra, and Garfield - Owlcation

Claudius Ptolemy - Biography, Facts and Pictures

The Math Book: From Pythagoras to the 57th Dimension, 250 Milestones in the History of Mathematics

Early Proofs of the Pythagorean Theorem by Leonardo Da Vinci, Ptolemy, Thabit ibn Qurra, and Garfield - Owlcation

Timeline Project by Natalie Tuites

Claudius Ptolemy: Born: About 85 in Egypt Died: About 165 in Alexandria, Egypt, PDF, Ptolemy