Kos Town — Solve Hippocrates' Hidden Oath

Kos Town welcomes you with the Castle of the Knights of Neratzia, a 15-meter fortress erected between 1311 and 1314 by the Hospitallers of Saint John on Byzantine foundations. These same Hospitallers perpetuated the Hippocratic medical tradition in their war hospitals. After Kos was taken by Suleiman the Magnificent in 1522, this citadel became an Ottoman prison — ironic fate for an island dedicated to healing. Here you decipher the first clues carved into the walls: Byzantine medical symbols mixed with the knights' coats of arms.

The Ancient Hellenistic Agora from the 3rd century BC reveals its 200 by 150 meters of Doric porticoes, theater of Hippocrates' consultations according to Plutarch. In this ancient market with public baths and altars dedicated to Hermes and Heracles, the father of medicine received his patients among the medicinal spice stalls. The Italian excavations of 1912 revealed surgical instruments and prescription tablets carved in marble — tangible proof that this place was Europe's first public hospital.

The Plane Tree of Hippocrates, a millennial sacred tree with a 4-meter circumference trunk, stands under its branches supported by pillars since the 18th century. Here, between 460 and 370 BC, Hippocrates taught rational medicine, revolutionizing an era when illness was attributed to gods. Byzantine sources from the 12th century attest that this tree still served as a place for medical consultations a thousand years after the master's death. Under its shade, you reconstruct the fragments of the Oath that founded Western medical ethics.

Plateia Eleftherias reveals its statue of Hippocrates erected in 1900, base engraved with the Hippocratic Oath in ancient Greek. This central square, rebuilt after the 1933 earthquake, concentrates the 19th-century neoclassical buildings where European doctors came to study Hippocratic manuscripts preserved in Ottoman libraries. The neighboring Archaeological Museum, built in 1935, houses the 2nd-century AD marble statue of Hippocrates and the Oath carved on a 4th-century BC stele — testimonies to the continuous veneration for the physician of Kos.

Your quest ends with the complete reconstruction of the Hippocratic Oath, each discovered fragment revealing a facet of Kos's medical heritage. From the Hospitallers' fortress to the ancient baths, you have retraced 2,500 years of continuous medical history. This Dodecanese island, UNESCO World Heritage candidate, reveals its secrets: how a 5th-century BC man revolutionized medicine for eternity, and why his oath still resonates in every medical office worldwide.