Ali Ghapu Palace (17th century). This palace was built at the time of Shah Abbas 1st. Ali Ghapu (The House of Government) is a six story building, each one of which is decorated with the finest paintings and plaster works of the Safawid period. Among these works are paintings by Reza Abbasi, a master painter of the Safawid court. At the time of Shah Abbas II, a hall with 18 pillars and the wooden fence was added to the third story of Ali Ghapu.  At the middle of this hall that overlooked the square, is a fountain made of copper. The most interesting part is the sound room. The plaster work on the walls and ceilings of this room is very beautiful. They depict the shape of various forms of jars, but they also served some acoustical purposes.