Ali Qapu (Persian: عالی‌قاپو, ‘Ālī Qāpū)(lit: "Grand Gate") is an imperial palace in Isfahan, Iran.

UNESCO inscribed the Palace and the Square as a World Heritage Site due to their cultural and historical importance.

The building, another wonderful Safavid edifice, was built by decree of Shah Abbas the Great in the early seventeenth century.

Ali Qapu is rich in naturalistic wall paintings by Reza Abbasi, the court painter of Shah Abbas I, and his pupils.

From the upper galleries, the Safavid shahs watched Chowgan (polo), army maneuvers and horse-racing in the Naqsh-e Jahan square.

Fourth Stage: Foundation of the eastern verandah or pavilion advancing towards the square, supported by the tower-shaped building.

By foundation of this verandah, the entrance vestibule was extended along the main gate and passage to the market, perpendicular to the eastern flank of the building.

These cut out shapes were not placed there to act as cupboards; the stucco-work is most delicate and falls to pieces at the highest touch.

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.

From the entrance of Ali Qapu mansion to the highest part of the music hall, the building has been decorated with the art of Iranian artists.

It is mentioned in the inscriptions and writings left in the Ali Qapu mansion that parts of the building were restored during the reign of Shah Sultan Hossein.