Like many of his contemporaries, he does not seem to have felt that his admiration for the pre-Islamic Iranian civilization conflicted with his Muslim Shiite faith. According to some accounts, he repaired the Imam Husayn Shrine in Karbala, and built a mausoleum of Ali in Najaf, which is today known as the Imam Ali Mosque. He is said to have been generous to a prominent Shiite theologian, but did not follow a Shiite religious policy and was tolerant to the Sunnis. He even tried to get closer to the Sunnis by giving his daughter in marriage to the caliph, which was a failure because the caliph refused to consummate the marriage.