|Plan of Jerusalem Engraved by J. & C. Walker after a plan by F. Elwood, published about 1850. Steel engraved plan with original hand color, coded to indicate the position of the various city walls over time. The blue line running left to right across the center of the map is believed to be what Josephus called the First Wall. The green line is Josephus' Second Wall and the red line is the Third Wall.