context: This mosque is a perfect example of Iranian Islamic architecture, and is seen as a masterpiece of Persian Architecture. The Shah Mosque is a timeless masterpiece of architecture in Iran. This mosque is registered, along with Naghsh-i Jahan Park, as a UNESCO World Heritage Site. Its construction began in 1611, the beauty of the mosque is mainly due to its seven-color mosaic tiles and calligraphic writings.
question: When was the Shah Mosque built?
answers.text: 1611