Miletus stood near the mouth of the Maeander River on the western coast of Anatolia, although its ruins now lie well inland. Archaeology reveals occupation and Aegean connections long before the city's celebrated Greek period, including Bronze Age contacts with Minoan and Mycenaean societies. Later Greek traditions explained its settlement through migration stories, but the evidence points to a complex history of interaction. Its coastal position eventually supported a prosperous Ionian city whose ships and merchants travelled far beyond their immediate surroundings.

During the seventh and sixth centuries BCE, Miletus became an important centre of trade and overseas settlement, with connections extending into the Black Sea. The city is also associated with Thales, Anaximander and Anaximenes, thinkers remembered for seeking explanations of nature through reasoned inquiry. Their surviving ideas are known largely through later writers, so their achievements require careful interpretation. Nevertheless, the Milesian intellectual tradition reflects the city's place within a world where travel, exchange and competition brought different kinds of knowledge into contact.

Miletus played a leading role in the Ionian Revolt against Persian authority at the beginning of the fifth century BCE. Following defeat at the naval battle of Lade, Persian forces captured and devastated the city in 494 BCE. Recovery and rebuilding followed under changing political circumstances. Its later urban layout became associated with regular planning, although attributing every surviving street to the famous planner Hippodamus would be misleading. Hellenistic and Roman benefactors added major public structures as the city continued to evolve over many generations.

The theatre, council house, baths and harbour monuments reveal the civic ambitions of these later periods. Religious life linked Miletus with the sanctuary of Apollo at Didyma through a sacred route. Gradually, sediment carried by the Maeander transformed the coastline and compromised access to the sea, undermining the geographical advantage on which earlier prosperity depended. Byzantine occupation continued within a changing settlement pattern. Under Turkish rule, the town known as Balat retained regional importance, and the İlyas Bey complex added a notable early fifteenth century architectural layer.

Systematic archaeological investigation, including German excavations beginning in 1899, has reconstructed much of the city's long development. Work continues to refine the relationship between buildings, occupation phases and environmental change. The apparent separation of the ruins from the coast is itself a major historical clue, showing how a thriving harbour could lose its maritime setting. Miletus therefore illustrates more than the origins of philosophy or Greek colonisation: it records repeated rebuilding, religious change and the powerful effects of river sediment on an urban economy.