Syed Tahir Alauddin al-Gilani (السيد طاهر علاؤ الدين الجيلاني البغدادي) (18 June 1932 – 07 June 1991) formally referred to as His Holiness, Qudwat-ul-Awliya Naqeeb-ul-Ashraaf Huzoor Pir Syed Tahir Alauddin al-Gilani al-Qadri al-Baghdadi, was a 20th-century Iraqi[1] Sufi Saint who was the head of the Qadiriyya Baghdadia Spiritual Tariqa.

The current Custodian of the Shrine of Abdul-Qadir Gilani is his elder-brother, Syed Ahmed Zafar Al-Gillani, who also served as the ambassador of Iraq in Pakistan from 1978 until 1992.

Al-Gillani first completed 40 days of seclusion (Chilla) at the Shrine of the Sufi saint Data Ganj Baksh Ali Hujwiri in Lahore.

Al-Gillani was very strict in adherence to the laws of Shariah and Tariqah, and until he died he worked tirelessly at propagating the teachings of his ancestor Abdul Qadir Gilani and the other mashaikh of the Qadiriyya path.

His visits included Saudi Arabia, India, Bangladesh, United Kingdom, Germany, Egypt, Canada, Indonesia, Singapore, Norway, the Netherlands, Belgium, Sri Lanka and the Persian Gulf countries.

To welcome Al-Gillani and for his protocol, Maulana Sardar Ahmed Qadri arranged for rolls of white silk to be spread the entire journey from his madrasah to the Railway Station.

It is reported that a small spot had been left uncovered near the door of the madrasah and Maulana Sardar Ahmed Qadri kneeled down and used his own beard to sweep this area clean.

At the conclusion of the gathering, the crowds were uncontrollable as they rushed in the hope of meeting or touching Al-Gilani so Maulana Sardar Ahmed ordered for a side wall had to be demolished so Al-Gillani could leave safely.

In 2007, Tahir Alauddin's Son Syed Muhammad Ziauddin al-Qadri al-Gilani inaugurated Darbar-e-Ghousia Qadiria Tahiria in Bradford, England.

[11] This Darbar is run under the guidance of Khalid Ali Tahiri Qadri (Sajjada Nasheen Darbar-e-Ghousia Qadiria Tahiria UK) after receiving approval from all three sons of Al-Gillani.