Greek and Roman religion was a complex polytheistic system with anthropomorphic gods and goddesses. It emphasized maintaining relationships with deities through prayer, offerings, and moral codes. Fate, oracles, and the afterlife were key concepts, while myths explained natural phenomena and conveyed cultural values. Religious practices included sacrifices, festivals, and mystery cults. Sacred spaces like temples and groves were central to worship. Greek philosophy influenced religious thought, while mythology permeated literature and art. This legacy continues to shape modern culture, language, and ethical principles.