The most important space unit in Ottoman architecture is the mosque. And it is in the mosques that we can best see how Sinan developed Ottoman interior space architecture. — Sinan: The Architect and His Works
Built during the Safavid period, it is an excellent example of Islamic architecture of Iran, and regarded as one of the masterpieces of Persian Architecture. The Shah Mosque of Isfahan is one of the everlasting masterpieces of architecture in Iran. It is registered, along with the Naghsh-i 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.