The Triumph of Tehran refers to the entrance of the pro-constitutionalists in Tehran on 13 July 1909, which led Mohammad Ali Shah Qajar to seek refuge at the Russian legation in Tehran, before he would be sent in exile.
In 1908, revolutionaries gathered in Azerbaijan, Isfahan (led by Ali-Qoli Khan Bakhtiari and his elder brother Najaf-Qoli Khan Bakhtiari), and Gilan, aiming to depose Mohammad Ali Shah Qajar. They killed Mohammad Ali Afkham (Aqa Balakhan), Rasht's governor.
After a five-day battle, the revolutionaries took the capital's control. At the same time, their leaders gathered in the Baharestan palace and decided to replace Mohammad Ali Shah Qajar with Ahmad Shah Qajar.
All these changes took place under the name of Superior parliament which involved 30 people.