The Shah Mosque (Persian: مسجد شاه), also known as Imam Mosque (Persian: مسجد امام), renamed after the 1979 Islamic revolution in Iran, and Jaame’ Abbasi Mosque, is a mosque in Isfahan, Iran, standing in south side of Naghsh-e Jahan Square. Built during the Safavid period, ordered by the first Shah Abbas of Persia. The mosque has also been called Jameh Mosque of Isfahan over the course of years.

View of the Mosque from Naqsh-e Jahan Square
It is regarded as one of the masterpieces of Iranian/Persian Architecture and an excellent example of Islamic era architecture of Iran. The Shah Mosque of Isfahan is one of the everlasting masterpieces of architecture in Iran. It is registered, along with the Naghsh-e Jahan Square, as a UNESCO World Heritage Site. Its construction began in 1611, and its splendor is mainly due to the beauty of its seven-colour mosaic tiles and calligraphic inscriptions. The mosque is one of the treasures featured on Around the World in 80 Treasures presented by the architecture historian Dan Cruickshank.

The mosque is depicted on the reverse of the Iranian 20,000 rials banknote