This document provides an overview of Greek mythology. It explains that the ancient Greeks were polytheistic and each city-state had its own patron gods. The most important gods, including Zeus, Hera, and Poseidon, lived on Mount Olympus. It also discusses some of the most well-known Greek heroes like Achilles, Odysseus, and Hercules. Finally, it lists several major Greek gods and goddesses and briefly describes their domains, such as Zeus ruling the sky, Hades governing the underworld, and Aphrodite representing love.