Al-Bukhari travelled through the Abbasid Empire from the age of 16 collecting only the traditions which were trustworthy and reliable beyond doubt. From nearly 300,000 traditions which until then were transmitted orally, he included only 2,602 traditions in his monumental work, al-Jami' al-Sahih. The book was completed in 846 AD and covers all aspects of life in Islam such as the method of performing prayers. It is considered the most authentic book after the Qur'an in Sunni Islam. The present copy is illuminated in a typical north African style and is a fine example of the late mediaeval manuscript production in the region.