Bahá'u'lláh (بهاءالله in Arabic) (November 12, 1817 - May 29, 1892) was the founder of the Bahá'í Faith.
Born Mírzá Husayn-'Alí (میرزا حسینعلی in Persian) in Tehran, Persia, he was also known as Bahá'u'lláh ("The Glory of God" in Arabic), as "He Whom God will make manifest" (from the Báb's writings), and as "Father of the Poor". Bahá'u'lláh's notable works include the Kitáb-i-Aqdas (Most Holy Book), Kitáb-i-Íqan (Book of Certitude), Epistle to the Son of the Wolf, and others. Many excerpts have been published in English in various compilations such as Gleanings from the Writings of Bahá'u'lláh.
Note that while a passport photograph of Bahá'u'lláh exists, Bahá'ís do not display His image for reasons of respect and devotion and ask that others respect their wishes on this subject.
Another group which recognizes Bahá'u'lláh as a Manifestation of God is the Orthodox Bahai Faith.