Sarouyeh was a large library in ancient pre-Islamic Iran

Iran

Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...

. The 10th century chronicler Ahmad ibn Rustah

Ahmad ibn Rustah

Ibn Rustah was a 10th century Persian explorer and geographer born in Rosta district, Isfahan, Persia....

 refers to it as "Sarough" (ساروق). The Fars Nameh of Ibn Balkhi

Ibn Balkhi

Ibn Balkhi was a 12th century historian of Persia, in the city of Balkh, in present day Afghanistan.He is known for his work the Fars Nama . Dehkhoda dictionary mentions him to be a contemporary of Muhammad I of Great Seljuk....

 calls it Haft Halkeh (هفت هلکه).

The library, located near where the city of Isfahan is today, is written by some sources to have been from the era of Tahmuras

Tahmuras

Tahmuras or Tahmures , New Persian transliteration ', older Persian Tahmurat or Tahmurath, from Avestan Taxma Urupa, is the third Shāh of the world according to Ferdowsi's Shāhnāma. He is considered as the builder of Merv; we have no proof for his existing as an earlier Aryan chief.-Tahmuras in the...

, in ancient Iran. Majmal al-tawarikh

Majmal al-tawarikh

Mojmal al-Tawarikh wa al-Qasas was a book written in Persia in 1126 CE by an unknown author. The title means "The Collection of histories and Tales"....

 also mentions the library.

The book Mahasen Isfahan (محاسن اصفهان) printed by Abbas Eqbal Ashtiani, gives details of the library and the books it contained from antiquity.

Abbas Milani

Abbas Milani

Abbas Malekzadeh Milani is an Iranian-American historian and author. Milani is a visiting professor of Political Science and the director of the Iranian Studies program at Stanford University. He is also a research fellow and co-director of the Iran Democracy Project at Stanford University's...

describes the fortified collection of writings and documents as such:

"Though only a few pages of its vast holdings have survived, we know of its grandeur through the testimony of its contemporaries, who compared it, in terms of the awe it inspired, to the Egyptian pyramids".