Uruk in ancient Sumer (Mesopotamia) is without doubt one of the earth's oldest known walled cities. The Ancient Egyptians also constructed fortresses about the frontiers with the Nile Valley to guard versus invaders from neighbouring territories, along with circle-shaped mud brick walls close to their cities. Many of the fortifications https://ist64208.magicianwiki.com/760386/the_smart_trick_of_sich_that_no_one_is_discussing