Harbour of Eleutherios

The Harbour of Theodosius (Latin: Portus Theodosiacus, Ancient Greek: λιμήν Θεοδοσίου) was one of the ports of ancient Constantinople, the capital of the Byzantine Empire, located beneath the modern Yenikapi neighbourhood of Istanbul, Turkey. It was built at the mouth of the Lycus watercourse that ran through the city to the Propontis (the Sea of Marmara). It may have been on or near the Harbour of Eleutherios (Medieval Greek: λιμήν Ἐλευθερίου) which is still unlocated in this area.