Pompeii city streets. Fun fact: the lower part of the streets were not for walking, but for sewage and water – and deliveries. People would walk on the sidewalks and use the large stones in the center to cross. Early mornings, donkeys with carts would traverse these one-way streets to make deliveries – all streets were in a grid and one-way only. The width of the street was just wider than the width of a cart – which had a wheelbase just wider than enough to clear the stones. The donkeys led wearing yokes that allowed them to weave to avoid the stones without moving the cart. In modern times that cart wheelbase has carried on .. to wagons, railroads and on.
Gastography 