The legitimacy of this religion was disputed by Subh-i-Azal, the brother of one of its members. Members of this religion celebrate four intercalary days during the period of Ayyam-i-Ha. The Priceless Pearl by Mary Maxwell (-5[1])is a biography of her husband, a leader of this religion who wrote the book God Passes By. The oldest extant temple of this religion is in Wilmette, a city near (*) Chicago, Illinois. The Lotus Temple in New Delhi is the largest of this religion’s Houses of Worship. The central text of this religion, the Kitáb-i-Aqdas, was written by its founder who used to be a follower of Bábism. This religion recognizes Jesus, Muhammad, and the Buddha as Manifestations of God. For 10 points, the unity of humanity is central to what religion founded in the 19th Century by Baháʼu'lláh? ■END■ (10[1])