The fellow who literally founded organized archaeology built the structure on top of it ~ presumably to preserve it through the ages to come.
Obama will be arriving in Israel and the Palestinian territories in the spring, and Palestinian media is speculating that he will visit the contested site, referred to as the Temple Mount by Jews and Al-Haram Al-Sharif by Muslims.
The Islamic site was created as the site where Mohammed supposedly ascended, though none of their history or literature places him in Jerusalem. It is a “manufactured” holy site for the Moon People.