Ali Qapu - Music room - Isfahan - Iran
Ālī Qāpū (Turkish for Sublime Gate; Persian: عالیقاپو) is a grand palace in Isfahan, Iran. It is located on the western side of the Naghsh-i Jahan Square opposite to Sheikh lotf allah mosque, and had been originally designed as a vast portal. It is forty-eight meters high and there are seven floors, each accessible by a difficult spiral staircase. In the sixth floor music room, deep circular niches are found in the walls, having not only aesthetic value, but also acoustic.