(b. 1483, Urbino, d. 1520, Roma)
The School of Athens (detail)1509
Stanza della Segnatura, Palazzi Pontifici, Vatican
On the right side of the scene, Euclid is using a compass to explain a geometric problem in a drawing. Behind stands the geographer Ptolemy, recognizable thanks to his crown and world sphere, and the astronomer Zoroaster, who is presenting the sphere of the stars.