Pythagoras is a prominent impact crater located near the northwestern limb of the Moon.

Only the western face of the interior can be viewed from the Earth, the other side being permanently out of sight.

The well-preserved rim of Pythagoras has a wide terrace system, and a slight rampart around the exterior.

In the center is a sharp, mountainous rise with a double peak that ascends 1.5 kilometers above the crater floor.

[1] By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Pythagoras.