The limits of the city of David are much debatable amongst the scholars. It seems that the area of the Jebusite city was no more than 40 dunams. It is said that king David had enlarged the Jebusite city by building the Millo (2 Samuel 5:9, 1 Chronicles 11:8. Most scholars agree that the Millo is an earthen fill, intended to connect the spur of the City of David with another area to its north, probably the Ophel . Kenyon's excavations revealed that the fortifications uncovered on the eastern slope of the City of David and dated to the days of the United Kingdom, were constructed atop seventh-century buildings, and thus the fortifications should be dated to the Second Temple period. This revelation suggested the City of David was wider than first presumed and that its walls were not built atop the slope, but in its center. Still, the area of the city was no more than 60 dunams, not including the Temple Mount area. In the days of King Solomon the city was further extended to include the area of Arauna's threshing-floor; now the city was about 130 dunam in size.