Which major Roman port city was constructed by Herod the Great with an innovative deep-water artificial harbor named Sebastos using hydraulic pozzolana concrete?

Answer and explanation

Correct answer: C. Caesarea Maritima

  1. Step 1: Herod the Great constructed Caesarea Maritima between 22 and 10 BCE as the administrative capital of Roman Judea.
  2. Step 2: Its harbor, Sebastos, used underwater-curing hydraulic pozzolana concrete imported from Italy to build vast breakwaters on an open coastline.
Answer
Caesarea Maritima.
Why not the others: Jaffa is a natural ancient harbor; Acre is a natural bay in northern Galilee; Ashkelon was a prominent Philistine and Hellenistic coastal city with natural anchorages.

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