One of the main treasures and rarities of library of the Grand Mosque in Mecca is the manuscript of 'Fawaid Al-Bazaz', aka 'Al-Gheilaniyat', which assumes the first place in the library that is classified as the oldest library in the world, as its giving started thirteen centuries ago.
The manuscript dates back to the fifth Hijri century and is displayed with another group of books and rare publications. Of course, to put the definition of a manuscript in a nutshell, it includes any handwritten book or document that is thousands of years old.
The library of the Grand Mosque in Mecca is honored to have the world's only complete copy of the manuscript of Majma' Al-Bahrain fi Zawaid Al-Mu'jamin book by Al-Haithami of 494 A.H., along with Al-Ghafeqi's book Mussnad Al-Muatta', which was transcribed in 693 A.H.
In addition, the library contains about six thousand eight hundred forty two original manuscripts and two thousand six hundred thirty four photocopied manuscripts.
The General Presidency for the affairs of the Grand Mosque and the Prophet's Mosque made the wish of millions of visitors come true as it established another branch for the library inside the Grand Mosque.