Uruk in ancient Sumer (Mesopotamia) is amongst the globe's oldest recognized walled cities. The Ancient Egyptians also built fortresses about the frontiers on the Nile Valley to safeguard in opposition to invaders from neighbouring territories, and also circle-shaped mud brick partitions close to their cities. Many of the fortifications of https://erickflrwa.wannawiki.com/86276/the_smart_trick_of_sich_that_no_one_is_discussing