and tribal tales said that Abraham himself had built it, with the help of his son Ishmael. Mohammed considered himself a descendant of Abraham and knew all about Abraham’s uncompromising monotheism. Indeed, Mohammed didn’t think he was preaching something new; he believed he was renewing what Abraham (and countless other prophets) had said, so he zeroed in on the Ka’ba. This, he said, should be Mecca’s only shrine: the temple of Allah.