Ancient Greek religion was a polytheistic belief system centered around a pantheon of gods and goddesses, such as Zeus, Hera, and Athena. These deities were believed to control various aspects of life and nature, and they were often worshipped through rituals, sacrifices, and festivals. Temples, like the Parthenon, were built to honor them, and myths explained their origins and relationships. The Greeks also believed in the importance of oracles, such as the Oracle of Delphi, where priests would interpret messages from the gods. Religious practices were deeply intertwined with daily life, influencing politics, art, and culture throughout ancient Greece.