Julius Caesar (Moon)

Named after Caesar - Roman emperor, introduced the Julian calendar (c. 102-44 B.C.).

Julius Caesar is a lava-flooded lunar crater with a low, irregular, and heavily worn wall. It is located to the west of Mare Tranquillitatis, and directly southeast of the crater Manilius on the Mare Vaporum. To the east is the rounded Sosigenes. The interior floor is level, especially in the southwest half. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.