Question: The Broad Wall, referenced in the book of Nehemiah, rebuilt at the beginning of the second temple period. The city walls of ancient Jerusalem. Answer: Ruins of the Broad Wall have been excavated within the Old City walls of present day Jerusalem (well below the current street level). The location of this ancient wall inside what is now Jerusalem (and its' much later walls) provides evidence of the extent of the rebuilding of Jerusalem and later expansion of the city. Nehemiah 3:8 Uzziel son of Harhaiah, one of the goldsmiths, repaired the next section; and Hananiah, one of the perfume-makers, made repairs next to that. They restored Jerusalem as far as the Broad Wall. Nehemiah 12:38 The second choir proceeded in the opposite direction. I followed them on top of the wall, together with half the people-past the Tower of the Ovens to the Broad Wall...

Many of these city walls were reconstructed after the Babylonian captivity on the foundations of, or incorporating pieces of, the earlier walls. One section of the pre-captivity wall is shown below.

2 Kings 25:1-4 So in the ninth year of Zedekiah's reign, on the tenth day of the tenth month, Nebuchadnezzar king of Babylon marched against Jerusalem with his whole army. He encamped outside the city and built siege works all around it. 2 The city was kept under siege until the eleventh year of King Zedekiah. 3 By the ninth day of the [fourth] month the famine in the city had become so severe that there was no food for the people to eat. 4 Then the city wall was broken through, and the whole army fled at night through the gate between the two walls near the king's garden, though the Babylonians were surrounding the city. (NIV)