`Abdu’l-Bahá', born `Abbás , was the eldest son of Bahá'u'lláh and served as head of the Bahá'í Faith from 1892 until 1921. `Abdu’l-Bahá was later canonized as the last of three "central figures" of the religion, along with Bahá'u'lláh and the Báb, and his writings and authenticated talks are regarded as a source of Bahá'í sacred literature.
