The Constitution House, or Khaneh Mashruteh, is a beautiful Qajar-era courtyard mansion that played a central role in Iran's Constitutional Revolution of 1906. Local leaders met here to organise resistance against Mohammad Ali Shah's attempts to dissolve the new parliament, and the house became a symbol of the movement that forced the monarchy to accept constitutional limits on its power.
Today it functions as a museum of the revolution, with original furniture, weapons, documents, and rooms reconstructed as they would have looked in 1907. The carved wooden balconies and stained-glass windows in the main hall are worth a visit on architectural grounds alone. A short walk from the Grand Bazaar.