What is the fine-grained topic of the following text: The article summarizes Dr. Mazar’s findings from the first phase—most notably the 70-meter-long and 6-meter-high wall that was constructed during the reign of King Solomon—and quotes one statement Dr. Mazar made to KDC about the potential for discovering more royal structures during this phase. Only return the topic.
Dr. Mazar's findings on King Solomon's wall and potential for discovering more royal structures