Osman Nuri Topbaş is an author, philanthropist, and spiritual leader of a Naqshbandi Sufi order based in Istanbul. His group is known as Eronkoy (named after the town where he was born) and, like other sufi groups in Türkiye, focuses heavily on charitable work. He has written works in history, literature, religious sciences, and poetry. Translations of his works span 43 languages, including English.