The Shah Mosque, also known as New Abbasi Mosque, Royal Mosque, or Imam Mosque after the Iranian Revolution, is a mosque in Isfahan, Iran, standing in south side of Naghsh-e Jahan Square. It was built during the Safavid dynasty, ordered by Abbas I of Persia.
It is regarded as one of the masterpieces of Persian architecture in the Islamic era. The Royal Mosque is registered, along with the Naghsh-e Jahan Square, as a UNESCO World Heritage Site. Its construction began in 1611, and its splendour is mainly due to the beauty of its seven-colour mosaic tiles and calligraphic inscriptions.
The mosque is depicted on the reverse of the Iranian 20,000 rials banknote.
Coordinates 32°39'17.585" N 51°40'40.441" E