Before there was the Baha'i Faith, there was the Babi religion, founded by the Bab, whose given name was Siyyid `Alí-Muhammad. He was born in Shiraz, Persia (now Iran).

The Declaration of the Bab, which took place in this room (pictured)
in the Persian city of Shiraz in 1844
On May 23, 1844, the Bab ("gate" in Arabic) announced that He was the bearer of a long-promised Divine Revelation destined to transform the spiritual life of the human race.
His role, He said, was to be the portal through which the universally anticipated Revelation of God would appear in the form of another Messenger. This Messenger from God would be far greater: He would usher in the age of peace and justice promised in Islam, Judaism, Christianity and all the other world religions.
The Bab referred to the Messenger as "Him Whom God shall make manifest" and said, "No words of Mine can adequately describe Him nor. . . do justice to His Cause."
That Messenger was Baha'u'llah.
On May 23, Baha'is celebrated the anniversary of the Declaration of the Bab, who, after His announcement, was arrested, beaten and imprisoned. On July 9, 1850, He was executed in the public square of the town of Tabriz.
The Declaration of the Bab is one of nine holy days on which Baha'is suspend work and school.
Prominent 19th century French writer A.L.M. Nicolas wrote that the Bab's life "is one of the most magnificent examples of courage which it has been the privilege of mankind to behold."
Baha'i blogger reflects on birth of the Baha'i Faith