A lot of European medieval cities are built on top of an ancient Roman city. You can usually perceive a very straight broad North-South street and a straight (b

A lot of European medieval cities are built on top of an ancient Roman city. You can usually perceive a very straight broad North-South street and a straight (but not so wide) East-West street, which have been kept from the earlier Roman city. The rest of the streets, however, seem to be in random order.