Mulla Husayn arrived in Shiraz in the spring of 1844 already searching for a promised figure his own teacher had spent years preparing his students to recognize, and by his own later account he had privately settled on a set of conditions that any true claimant would have to meet without being told what they were. On the evening of 22 May, Siyyid Ali-Muhammad, a young merchant Mulla Husayn had not previously singled out, invited him into his home and, over the course of the night, answered every one of those unspoken conditions and declared himself the Bab, the Gate to a promised one still to come. Mulla Husayn later wrote that he experienced the night as a period outside ordinary time, and Babi and Baha'i tradition alike dates the entire subsequent religious history that followed, first the Babi movement and later the Baha'i Faith that grew from it, to that single conversation in that single house.
The house itself was unremarkable by the standards of Shiraz merchant architecture, and nothing about its construction marked it out in advance as a future object of pilgrimage. What transformed it was entirely the event that happened inside it, which is precisely the pattern Baha'i teaching holds up as central to how sanctity attaches to place: not an inherent property of stone and courtyard, but the trace left by a decisive religious moment, which is also why the site's later demolition did not, in Baha'i teaching, extinguish its significance as a point of pilgrimage even once the building itself was gone.