Where Ephesus stood and why it mattered
Ephesus lay on the Aegean coast of what is now western Turkey, near the modern town of Selcuk. In antiquity it sat at the mouth of the Cayster river (the Kaystros), with a sheltered harbour and routes leading inland up the river valleys. That combination of sea access and inland reach explains most of its history: it was a port, a market and, for centuries, a religious centre.
The ruins visible today are mostly Roman, but they sit on top of older layers. Ephesus was in use, in one form or another, from the Bronze Age into the Byzantine period, and it was not always in the same spot. Understanding why the city moved is the key to reading the site.
Before the Greeks
Hittite texts mention a place called Apasa, the capital of the land of Arzawa, and many scholars identify it with Ephesus, though the identification rests on name similarity and geography rather than a decisive inscription. Bronze Age remains have been found on and near Ayasuluk Hill, the height above the later town. Mycenaean-style finds in the area also suggest contact with the Aegean world before the Greek migrations. How much continuity there was between these early people and the later Greek city is not fully clear. For the wider Anatolian background, the story of the Hittite kingdom is a useful companion.
The Ionian foundation
Greek tradition says Ephesus was founded by Ionian settlers led by Androklos, a son of the Athenian king Kodros, probably in the early first millennium BCE. This is traditional history rather than a documented event, and archaeology only partly supports it. What is clear is that by the Archaic period Ephesus was one of the Ionian cities of the Anatolian coast, with a sanctuary of Artemis that drew worshippers from a wide area. The sanctuary and its later monumental temple are covered in a separate article on the Temple of Artemis.
Lydian and Persian rule
In the mid-sixth century BCE the Lydian king Croesus took Ephesus, and later writers say he helped pay for the great temple. After the Persians overthrew Croesus, the city came under Persian rule, a change that began with Cyrus the Great and brought Ionia into a very large empire. Ephesus took part in the Ionian Revolt of the early fifth century BCE, one of the opening episodes in the wider Greco-Persian conflict, and later passed under Athenian influence, Persian control again, and then the Hellenistic kingdoms that followed Alexander.
A new city under Lysimachos
Around 300 BCE one of Alexander’s successors, Lysimachos, moved the city to a new site between two hills, closer to the harbour and the sea. Ancient writers say the inhabitants were reluctant to leave their old homes; the details of how he persuaded them are told in anecdotes that should be treated cautiously. He named it Arsinoeia after his wife, but the older name survived. Parts of his circuit wall can still be traced on the hills.
Roman Ephesus
In 133 BCE the last king of Pergamon left his kingdom to Rome, and a few years later it became the Roman province of Asia. Ephesus grew into one of the largest and richest cities of the eastern Mediterranean. Most of the standing remains date from the first to third centuries CE, including the theatre, the main streets, the baths, fountains and the library. Each of these is explored in more detail in the articles on the Roman buildings and on the city as a provincial centre. For general context, the story of Roman expansion shows how this region came under one government.
Ephesus also became important in early Christianity. Paul spent time there according to the Acts of the Apostles, and a church council met in the city in 431 CE.
Decline
The harbour was a constant problem. The Cayster river carried silt that gradually filled the bay, and repeated dredging and new harbour works could only slow this down. As the sea retreated, the port lost its value, and with it much of the city’s trade. Earthquakes, raids and the disruption of the late Roman world added to the pressure. Goths are reported to have raided the city in the third century CE, and the old temple never recovered its earlier role.
In the Byzantine centuries the population shifted toward Ayasuluk Hill, where a fortress and a major church later stood. The Seljuk and Ottoman periods followed, and the lower city gradually fell out of use and was covered by silt and rubble.
Archaeological work at Ephesus
The modern study of the site began in the nineteenth century. John Turtle Wood, working for the British Museum, searched for the Temple of Artemis from 1863 and identified it in 1869. Austrian archaeologists began excavating in 1895 and have worked at Ephesus, with interruptions, ever since, supported by the Austrian Archaeological Institute. Many of the standing monuments were reassembled from fallen blocks by a method called anastylosis, which restores a building using its original pieces. Visitors see the library facade in this restored form.
Because the work has run for well over a century, Ephesus is also a good case study in changing archaeological methods, from early treasure hunting to modern survey, geophysics and environmental study of the river delta. The overall record of the Ephesus excavations is long, and new work continues to refine the dates and the layout of the earlier city. UNESCO inscribed the site on the World Heritage List in 2015.
What remains uncertain
Several questions are still debated: the exact location of the Archaic city, the size of its population at different times, and how far the Bronze Age settlement connects to the Greek foundation story. Estimates of ancient populations rely on assumptions about housing and density, so figures quoted for Ephesus vary widely. Visitors should treat any single number with care.