Quṭb al-Aqṭāb Khwāja Sayyid Muḥammad Bakhtiyār al-Ḥusaynī, Quṭb al-Dīn Bakhtiyār Kākī (Arabic: قُطْبِ الدِّينِ بَخْتِيَارِ كَاكِي, romanized: Qutb-ud-Dīn Bakhtiyār Kākī) is(born 1173 – died 1235) was a Sunni Muslim Sufi mystic, saint and scholar of the Chishti Order from Delhi, India. He was the disciple and the spiritual successor of Khawaja Sayyid Mu'in al-Din Chishti as head of the Chishti order. Before him the Chishti order in India was confined to Ajmer and Nagaur. He played a major role in establishing the order securely in Delhi. His Dargah is located adjacent to Zafar Mahal in Mehrauli, and is also the venue of his annual Urs festivities. The Urs was held in high regard by many rulers of Delhi like Iltutmish who built a nearby stepwell, Gandhak ki Baoli for him, Sher Shah Suri who built a grand gateway, Bahadur Shah I who built the Moti Masjid mosque nearby and Farrukhsiyar who added a marble screen and a mosque.
His most famous disciple and spiritual successor was Khawaja Sayyid Fariduddin Ganjshakar, who in turn became the spiritual master of Delhi's noted Sufi saint, Nizamuddin Auliya, who himself was the spiritual master of Amir Khusrau and Nasiruddin Chiragh Dehlavi.
