Haji Mehdi Koozekonani was a successful merchant in the Bazaar of Tabriz, a man of means and reputation. When the Constitutional Revolution erupted in 1905, challenging the Qajar monarchy's autocratic rule, he did not stand aside. He opened his home. More than that, he became one of the revolution's major financiers, pouring his commercial wealth into a political cause that could have cost him everything. The house he offered was no ordinary dwelling. Built in 1868 by the architect Haj Vali Me'mar-e Tabrizi, it featured the elegant two-story layout typical of Qajar residential architecture, with distinct internal and external reception areas. Its location next to the bazaar made it both convenient and camouflaged -- revolutionaries could slip in and out among the crowds of merchants and shoppers without attracting undue attention.

What made the Constitution House genuinely dangerous was its printing operation. In an era when the shah controlled official communications, the ability to produce and distribute independent newspapers was an act of defiance. Night letters -- anonymous pamphlets distributed under cover of darkness -- rolled off the press hidden inside Koozekonani's home. These documents carried the arguments for constitutional government, spread news of the movement's progress, and rallied supporters across Tabriz. The house also served as the meeting place where revolution leaders debated strategy and coordinated resistance. By April 1909, the Tabriz constitutionalists had driven royalist forces from the city, though at tremendous cost. Sattar Khan was wounded in the leg, permanently disabled for the rest of his life. He died in 1914, a national hero. The revolution he helped lead succeeded in establishing Iran's first parliament and constitution, fundamentally altering the country's political trajectory.

History revisited the house after World War II. Between 1945 and 1946, the Azerbaijan Democrat Party used it as a meeting center during the brief Azerbaijan People's Government, a Soviet-backed autonomous state in northwestern Iran. The house thus witnessed two very different political movements separated by four decades -- one a grassroots push for constitutional democracy, the other a Cold War proxy conflict. The building absorbed both episodes into its walls, layering one political legacy atop another. In 1975, recognizing the house's significance to Iranian history, the Cultural Heritage Organization registered it as a protected heritage site.

Today the Constitution House operates as a museum. The first floor displays sculptures of the revolution's famous figures -- Sattar Khan, Bagher Khan, and their fellow constitutionalists -- alongside their personal belongings. Visitors can see the actual weapons carried during the uprising, the underground newspapers that once circulated in secret, and the printing machine that produced them. Photographs from the revolution line the walls, faces staring out from a century ago. The building sits where it always has, adjacent to the Grand Bazaar, in the dense historical core of Tabriz. The bazaar merchants who pass by daily are the professional descendants of men like Koozekonani -- traders who understood that commerce and political freedom were inseparable, and that a printing press hidden in a merchant's house could change the course of a nation.