1844: the Beginnings of the Bahai Faith, a movement to unite all religions

On May 23, 1844, there arose in Shiraz, Persia, a young man, Ali Mohammed by name, who declared Himself to be The Bab [the Arabic word for door or gate], or the forerunner of  "He whom God would Manifest"---a great teacher, Who was soon to appear with manifest signs of divine power, through Whose teachings the religious unity of all peoples would be accomplished.

Remey, Charles Mason, The New Day; the Bahai Revelation, a brief statement of its history and teachings, Chicago: Bahai Publishing Society, 1919, p. 14.

In the year one thousand two hundred and sixty [A. H.], when he [the Báb] was in his twenty-fifth year [Jamádí-ul-Úlá 5th, 1260 A.H. (May 23rd, 1844 A.D.) is the date given by the Báb himself in the Persian Beyán as that whereon his mission commenced.], certain signs became apparent in his conduct, behaviour, manners, and demeanour whereby it became evident in Shíráz that he had some conflict in his mind and some other flight beneath his wing. He began to speak and to declare the rank of Báb-hood. Now what he intended by the term Báb [Gate] was this, that he was the channel of grace from some great Person still behind the veil of glory, who was the possessor of countless and boundless perfections, by whose will he moved, and to the bond of whose love he clung.

Browne, Edward G., A Traveller's Narrative written to illustrate the episode of the Báb, Cambridge: The University Press, 1891, p. 3.