The Baháʼí Faith, a fast growing religion, teaches that men and women are equal. Prominent women celebrated in Baháʼí history include Bahíyyih Khánum, who acted head of the faith for several periods during the ministries of `Abdu'l-Bahá and Shoghi Effendi, and Táhirih, who is also held by Baháʼís as a penultimate leader. Women serve in higher percentages of leadership in appointed and elected national and international institutions of the religion than in the general population. However, only men are allowed to be members of the religion's highest governing body, the Universal House of Justice.