Bastam Grand Mosque is located at a distance of 200 meters from the tomb of Bayazid, a famous Persian Sufi, south of the city of Bastam, in Iran’s northern province of Semnan. It was constructed in the 1st century AH.
The historic mosque is connected to the Kashaneh Tower in the southeast. The tower has 30 sides. Some researchers believe this structure is a relic from the times of Qazan Khan Mongol and it was previously known as Qazaneh.
The following are the pictures Mehr News Agency has posted online of the mosque and the tower: