The moment
Ismāʿīl I, aged about fourteen, took Tabriz, was crowned shah and proclaimed Twelver Shiʿism the religion of his new state. Iran was then mostly Sunni: historians describe a long conversion enforced by the state, in which Sunnis were persecuted, driven out or killed. Iran is today the country with the largest Shiʿi population.
People: Ismāʿīl I