The name Ali Qapu, from Arabic "Ālī" (meaning "imperial" or "great"), and Turkish "Qāpū" (meaning "gate"), was given to this place as it was right at the entrance to the Safavid building, another wonderful Safavid edifice, was built by decree of Shah Abbas I in the early seventeenth century. It was here that the great monarch used to entertain noble visitors, and foreign ambassadors. Shah Abbas, here for the first time, celebrated the Nowruz (Iranian New Year) of 1006 AH .
When Iranians were defeated by Ottoman forces, they were forced to move their capital from Tabriz to Qazvin, and then to Isfahan, to avoid occupation of the capital city. At each of these cities, they established a new palace. It may refer to the room on the sixth floor which was decorated with plaster-work, representing pots and vessels and one is famous as the music hall. These cut out shapes were not placed there to act as cupboards; the stucco-work was placed in position in these rooms for ornament and decoration. The rooms were used for private parties and for the king's musicians, and these hollow places in the walls retained the echoes and produced the sounds of the singing and musical instruments clearly in all parts. Ali Reza Abbasi the prominent artist has worked on glorious miniature paintings. The main reception hall and all other rooms were decorated with fabulous plaster work, plaster carving and miniature paintings.We have reproduced the models of the plaster works in this room.
http://www.rahgoshaymuseum.com/en/museum-sections/485-ali-qapu-room-fa#sigProGalleriaafeb6254ef