Naqsh-e Jahan Square (Image of the World Square"), also known as the Saeed Square, and Shah Square prior to 1979, is a square situated at the center of Isfahan, Iran. Constructed between 1598 and 1629, it is now an important historical site, and one of UNESCO's World Heritage Sites. It is 160 metres (520 ft) wide by 560 metres (1,840 ft) long (an area of 89,600 square metres (964,000 sq ft)). It is also referred to as Shah Square or Imam Square. The square is surrounded by buildings from the Safavid era. The Shah Mosque is situated on the south side of this square. On the west side is the Ali Qapu Palace. Sheikh Lotf Allah Mosque is situated on the eastern side of this square and at the northern side Qeysarie Gate opens into the Isfahan Grand Bazaar. Today, Namaaz-e Jom'eh (the Muslim Friday prayer) is held in the Shah Mosque.
The square is depicted on the reverse of the Iranian 20,000 rials banknote.
In 1598, when Shah Abbas decided to move the capital of his empire from the north-western city of Qazvin to the central city of Isfahan, he initiated what would become one of the greatest programmes in Persian history; the complete remaking of the city.