 During the reign of Hezekiah (reign c. 716–697/687 BCE), the walls of Jerusalem were expanded westward, across the Central Valley from the City of David and the Temple Mount, enclosing a previously unwalled suburb in the area known today as the Western Hill of the Old City.The debate within biblical archaeology on whether this site on the hill southeast of the Old City could be identified with what the Hebrew Bible calls Jebus and later the City of David, began in the late 19th century with the excavations of Charles Warren and Hermann Guthe.The 1909–11 work of Louis-Hugues Vincent and Montagu Brownlow Parker identified the earliest known settlement traces in the Jerusalem region, suggesting the area was an ancient core of settlement in Jerusalem dating back to the Bronze Age.