This article aims to demonstrate a manuscript book named “Müseccelü’l İmâm” to sciences world. This manuscript is reached with project of “Ottoman Manuscripts at the Al-Quds University” in Library of Al-Quds University. This book belongs to the Ottoman period and the author is Ali b. İbrahim b. Hızır b. İshak al-Kastamûnî. This manuscript has been recorded “unknown” and has not been added to the catalog in Library of Al-Quds University. Therefor it has not been studied never. During the studies carried out in the university library, we tried to identify the identity of the book and photographed all its pages. Identify information was reported to the library administration. Also official works have been started for returned the book toTurkey. This article is the first study about mentioned book. The photographs and the first stages of the study were completed at the Al-Quds University. The structural and content review of the book is made out of photographs after returning to Turkey. A chapter has been partially translated in the content review of the book. The book was prepared with the use of writers such as Kâdîhan, Tahâvî, Halvânî and works such as al-Câmiu’-l Kebîr, al-Câmiu’s-Sağîr, al-Hidâye, and Mültekat. It includes praying, praying conditations and wisdoms. The author's reason for writing the book was “the public's unwillingness to praying.” The part related to the wisdoms of praying was written quite extensive. This part is included verses, hadiths and narrations. Although the book was owned by a library near the Ulu Mosque in Sivas, it is now in the West Bank area of Jerusalem.
Jerusalem, Manuscript, Ottoman, Müseccelü’l-İmam, Fiqh of al-Hanefi, Praying.