Pompeii
Geography

Pompeii was built approximately 40 m (130 ft) above sea level on a coastal lava plateau created by earlier eruptions of Mount Vesuvius (8 km or 5 mi distant). The plateau fell steeply to the south and partly to the west into the sea. Three layers of sediment from large landslides lie on top of the lava, perhaps triggered by extended rainfall. The city, once by the shoreline, is today circa 700 m (2,300 ft) inland. The mouth of the navigable Sarno River, adjacent to the city, was protected by lagoons and served early Greek and Phoenician sailors as a haven port, later developed by the Romans.

Pompeii covered a total of 64 to 67 hectares (160 to 170 acres) and was home to 11,000 to 11,500 people, based on household counts.
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