In Shiraz, Iran, the Báb declared himself to be a messenger of God to Mullá Husayn, leading to the foundation of Bábism, considered to be a precursor to the Baháʼí Faith.

Shiraz is the fifth-most-populous city of Iran and the capital of Fars province, which has been historically known as Pars (پارس) and Persis. As of the 2016 national census, the population of the city was 1,565,572 people, and its built-up area with Sadra was home to almost 1,800,000 inhabitants. A census in 2021 showed an increase in the city's population to 1,995,500 people. Shiraz is located in southwestern Iran on the rudkhaneye khoshk seasonal river. Founded in the early Islamic period, the city has a moderate climate and has been a regional trade center for over a thousand years.

The Báb was an Iranian religious leader who founded Bábism, and is also one of the central figures of the Baháʼí Faith. The Báb gradually and progressively revealed his claim in his extensive writings to be a Manifestation of God, of a status as great as Moses, Jesus, and Muhammad, receiving revelations as profound as the Torah, Gospel, and Quran. This new revelation, he claimed, would release the creative energies and capacities necessary for the establishment of global unity and peace.

Mullá Husayn, also known by the honorific Jináb-i Bábu'l-Báb, was a Persian religious figure in 19th century Persia and the first Letter of the Living of the Bábí religion. He was the first person to profess belief in the Báb as the promised Mahdi of Islam and a Manifestation of God, founding a new independent religion. The title of Bábu'l-Báb was bestowed upon him by the Báb in recognition of his status as the first Bábí.

Bábism is a messianic movement founded in 1844 by the Báb. The Báb, an Iranian merchant-turned-prophet, professed that there is one incorporeal, unknown, and incomprehensible God who manifests His will in an unending series of theophanies, called Manifestations of God. The Báb's ministry, throughout which there was much evolution as he progressively outlined his teachings, was turbulent and short-lived and ended with his public execution in Tabriz in 1850. A campaign of extermination followed, in which thousands of followers were killed in what has been described as potentially one of the bloodiest actions of the Qajar Iranian military in the 19th century.