The Vespasianus Titus Tunnel is a 2,000-year-old engineering marvel – a massive tunnel dug through a mountain that was built to divert the floodwaters threatening the harbor near the ancient city of Seleuceia Pieria in what is now Turkey. According to UNESCO, it is one of the most magnificent remains of the Roman period because of its size, well-preserved authenticity, and architectural and engineering features. Emperors and Inscriptions: Clues to the Builders of the Titus Tunnel The Titus Tunnel was neither built, nor completed by the Emperor Titus. The construction of this tunnel, began during the reign of Vespasianus, the father of Titus, during the second half of the 1 st century A.D. Although work continued during the reign of
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