Emha Ainun Nadjib, known as "Cak Nun, Mbah Nun," is a prominent Indonesian Muslim intellectual, poet, essayist, and cultural figure famous for his Islamic-themed works, social criticism, and humanist perspective. He leads the Kiai Kanjeng musical group and founded the Masyarakat Maiyah (Maiyah Community) for religious and cultural discussions, promoting religious pluralism and open discourse through performances and studies across Indonesia.