Ancient Halicarnassus occupied the sheltered harbour now surrounded by Bodrum, on the southwestern coast of Turkey. Its inhabitants lived at a meeting point between the Greek Aegean and the societies of inland Caria. Greek traditions associated the settlement with Dorian colonists, but its history cannot be reduced to a single foundation story. Carian names, political connections and local traditions remained important. The historian Herodotus, born here in the fifth century BCE, emerged from this culturally mixed environment before travelling and writing about the wider Mediterranean world.

The city's greatest transformation came in the fourth century BCE under Mausolus, a ruler of Caria within the Persian Empire. He transferred his principal residence to Halicarnassus and developed its harbour, defences and monumental buildings. His power depended on both Persian imperial authority and regional alliances. After his death in 353 BCE, his wife and sister Artemisia II continued the great tomb associated with his dynasty. Greek sculptors contributed to a structure combining architectural and artistic traditions on an unusually ambitious scale.

The Mausoleum became one of the celebrated Seven Wonders of the ancient world, and its name eventually supplied the general word for a monumental tomb. Its fame should not obscure the functioning city around it, with streets, sanctuaries, shipping and a substantial theatre. In 334 BCE, Alexander the Great besieged Halicarnassus during his campaign against Persia. Fierce resistance and destruction marked the struggle, although the city's subsequent history continued through the Hellenistic kingdoms and incorporation into Roman provincial administration.

Over later centuries, earthquakes, abandonment and the reuse of building materials reduced the Mausoleum to fragments. The Knights Hospitaller, who established their castle at Bodrum in the early fifteenth century, incorporated ancient stone into its walls. This connected the remains of the Carian capital with a new maritime stronghold contested in the eastern Mediterranean. Ottoman rule followed the knights' departure in the sixteenth century. The settlement's changing names and rulers reflected successive political worlds rather than a complete break in occupation.

Excavations directed by Charles Newton in the nineteenth century identified the Mausoleum's remains and removed major sculptures to the British Museum. Subsequent archaeological work has clarified other parts of the ancient city, while modern Bodrum has expanded over much of its footprint. The theatre, stretches of fortification and Myndos Gate offer important evidence beyond the famous tomb. Together with the castle's reused stones, they reveal how royal ambition, warfare, trade and later rebuilding repeatedly reshaped the same coastal setting over more than two millennia.