I offer this view to show a few points. This is a Roman town, and the streets have been kept straight, although not on a perfect rectilinear grid. The buildings, with a few notable exceptions, are quite small. There is not much open space within the city, and it was probably used intensively as a marketplace.
Pompei is the object lesson of all time - watch where you put your city! Even a century ago, we still had not learned this lesson - in 1902 the town of St. Pierre on Martinique was totally destroyed by a volcanic eruption that killed all but one of its citizens. The lesson was finally learned in Martinique, and the new capital built much farther from the volcano. However, Naples remains in harm's way - the tragedy of Pompei was never really taken to heart.
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