Excavations at Dor since 1980 on behalf of the Hebrew University under the direction of Ephraim Stern have revealed extensive remains of the Byzantine city (in the sixth century C.E.), and beneath that the remains of the second-century B.C.E. Hellenistic city, shown in this view. The walled city was apparently built under King Ptolemy II Philadelpheus (285-246 B.C.E.) in a Hippodamian, or checkerboard, pattern of city blocks separated by broad, well-paved streets, as in this slide. Shops open into the street on both sides, and houses and apartments stood above and behind the shops. The city was well-drained and equipped with an advanced sewage system and an aqueduct. A drain is visible cutting across the street at a low angle in the middle ground.