Ali Qapu palace which is a unique example of palace architecture in the Safavid era was constructed under the order of Shah Abbas I in the early 11th century A.H. The monarch received special envoys in this palace and held his audience here. There are five floors in this palace and each floor has its special decorations. During the reign of Shah Abbas II, a royal parlor (Shah Neshin) was added to the main building and the sovereign and his guests watched polo, illuminations, fire-works and the dramatics that took place in the Nagsh-e-Jahan Square from the halls of this elegant palace. This palace was also called 'Daulat Khaneh-e-Mobarakeh Nagsh-e-Jahan' and the 'Daulat Khaneh Palace'. Its unique archaic architecture is related to the Safavid era.