Jameh Mosque of Ferdows which is today called Ancient Mosque is one of the most prominent places in Ferdows, located in southwest of Toon archaeological site. This mosque belongs to the Seljuk period and is one of the national works of Iran. It is mostly believed that this mosque was built during Seljuk dynasty, in the 11th century, but some researchers have an opinion that it was built in the 7th century. The porch of the mosque is 16 meters high and its cover shows the characteristic of the architectural style of Khorasani. The decorative brick of this porch, repeats a geometric shape in 60 to 60 cm molds. There also are paintings on the stucco in the interior view. What is left of the mosque is the summer and winter bedchambers on the northern and southern sides. In the other part, which is the winter section of this mosque, there is a large shabestan with columns of 2 meters in diameter, these columns are as tall as 5.2 meters and 100 columns hold the heavy ceiling of this shabestan. The shabestan was built by Mullah Akbar Tooni. In addition, Ferdows is known for its pomegranate and saffron. Visiting this old mosque is worth a day spending time visiting and taking photos of all its parts and have them in your memories.