ʿAbd al-Qādir Gīlānī, (, formally Muḥyī l-Dīn Abū Muḥammad b. Abū Sālih ʿAbd al-Qādir al-Gīlānī al-Ḥasanī wa'l-Ḥusaynī (, , , ), known as for short was a Hanbali Sunni Muslim preacher, orator, ascetic, mystic, sayyid, faqīh, and theologian. He was known for being the eponymous founder of the Qadiriyya tariqa (Sufi order) of Sufism.