The term "Ja'fari" relates to Imam Ja'far al-Sadiq (d. 765). Ja'fari became increasingly used during the twentieth century in the efforts to add Shi'ism as a fifth school of law (madhhab) along with the four established Sunni schools. This led to an interview (and later a fatwa) given by the Shaikh al-Azhar Mahmud Shaltut in 1959. Shaltut went as far as declaring that Muslims are free to attach themselves to any of the five schools.