Qeiyafa clearly reveal an urban society that existed in Judah already in the late eleventh century BCE. It can no longer be argued that the Kingdom of Judah developed only in the late eighth century BCE or at some other later date." The techniques and interpretations to reach some conclusions related to Khirbet Qeiyafa have been criticized by some scholars, such as Finkelstein and Alexander Fantalkin of Tel Aviv University. In 2010, archaeologist Eilat Mazar announced the discovery of part of the ancient city walls around the City of David which she believes date to the tenth century BCE. According to Mazar, "It's the most significant construction we have from First Temple days in Israel" and "It means that at that time, the 10th century, in Jerusalem there was a regime capable of carrying out such construction." The 10th century is the period the Bible describes as the reign of King Solomon. Not all archaeologists agree with Mazar and archaeologist Aren Maeir is dubious about such claims and about Mazar's dating. In the Jewish Study Bible (2014), Oded Lipschits states the concept of United Monarchy should be abandoned, while Aren Maeir believes there is insufficient evidence in support of the United Monarchy. In August 2015, Israeli archaeologists discovered massive fortifications in the ruins of the ancient city of Gath, supposed birthplace of Goliath. The size of the fortifications show that Gath was a very large city in the 10th century BCE, perhaps the largest in Canaan at the time. The professor leading the dig, Aren Maeir, estimated that Gath was as much as four times the size of contemporary Jerusalem, which cast doubt that David's kingdom could have been as powerful as described in the Bible. In his book, The Forgotten Kingdom (2016), Israel Finkelstein considered that Saul, originally from the Benjamin territory had gained power in his natal Gibeon region around the 10th century BCE, and that he conquered Jerusalem in the south and Shechem to the north, creating a polity dangerous to Egypt's geopolitical intentions. So, Shoshenq I, from Egypt, invaded the territory and destroyed this new polity, and installed David of Bethlehem in Jerusalem (Judah) and Jeroboam I in Shechem (Israel) as small local rulers which were vassals of Egypt. Finkelstein concludes that the memory of a united monarchy was inspired by the Saul's conquered territory serving first the ideal of a great united monarchy ruled by