Greek mythology encompasses a rich tapestry of narratives surrounding the gods, heroes, and rituals that characterized the beliefs of the ancient Greeks during Classical antiquity. Although some critical thinkers, notably the philosopher Plato in the 5th-4th centuries BCE, recognized that myths included elements of fiction, they were generally accepted as truth among the populace. Greek mythology has profoundly influenced Western arts and literature, cementing its importance across different cultures and eras.

The origins of myths often stem from both literary and archaeological sources. The epic poems attributed to Homer, primarily the Iliad and the Odyssey, are foundational texts that provide insight into these mythologies. According to the 5th-century BCE historian Herodotus, the characteristics of the Olympian gods as we know them were shaped by figures like Homer and Hesiod. The familiarity of these deities was well established in the cultural consciousness, as Homer’s narratives expected audiences to have prior knowledge of the associated myths. Notably, many ancient Greek thinkers took these myths seriously, often reinterpreting or allegorizing them to convey deeper meanings.

Hesiod is another critical figure, with his poems, Theogony and Works and Days, serving as key sources for understanding the genealogy of the gods and the moral landscape of existence. Theogony, around 700 BCE, details divine lineages while Works and Days juxtaposes practical advice for farmers with dialogues on justice through Hesiod’s address to his possibly nonexistent brother, Perses. Scholars often consider these works as contrasting themes that complement each other: the origins of the divine versus the trials of human life and morality.

Further expanding the body of Greek myths were the post-Homeric epics, which filled gaps in reports regarding the Trojan War. The Homeric Hymns, along with lyric poets and the odes of Pindar, enriched the mythological canon. The work of the three prominent tragedians—Aeschylus, Sophocles, and Euripides—remains a valuable repository of diverse traditional narratives from the 5th century BCE.

During the Hellenistic period (323–30 BCE), poets like Callimachus and mythographers such as Euhemerus contributed to the corpus of Greek mythology by exploring lesser-known tales and introducing ideas like Euhemerism, which posited that gods had originally been human. Additionally, Apollonius of Rhodes provided the most complete account of the Argonauts’ quest for the Golden Fleece during this era.

With the advent of the Roman Empire, significant contributions to the understanding of Greek mythology were made through historical texts like Strabo’s Geography, the Library of the pseudo-Apollodorus, and the works of historians such as Plutarch and Pausanias, each offering valuable insights into the mythological traditions.

Archaeological findings, particularly from the Mycenaean and Minoan civilizations, have advanced our contemporary understanding of these myths. Early excavations led by figures such as Heinrich Schliemann and Sir Arthur Evans unearthed artifacts and structures from these cultures, providing a contextual background for the different mythological themes. Discoveries from the 8th century BCE, including geometric pottery featuring scenes from the Trojan cycle and the tales of Heracles, further illuminate the development of these myths, even though their interpretation remains challenging due to the lack of accompanying inscriptions.

The evolution of Greek mythology continued through the Archaic, Classical, and Hellenistic periods, where a blend of literary and visual representations maintained the relevance of these ancient stories.