Hazrat Nasiruddin Mahmood was a prominent saint of the Chishti Order. He was a mureed (disciple) of the great saint, Hazrat Nizamuddin Auliya and later his khalifa (successor). He was the last recognised khalifa of the Chishti Order from Delhi and was given the title, "Roshan Chirag-e-Delhi", which in Urdu means "Illuminated Lamp of Delhi".
In his lifetime Khwaja Nasiruddeen Chiragh witnessed the final ruin of the kingdom of Delhi and the fragmentation of the Chishtia silsila. Under his guidance, the sacred order managed to stay true to its principles of remaining above politics and the whims of kings, even though in his haste to combat the popularity of the silsila, the reigning sultan destroyed Delhi itself. was born as Nasiruddin around 1274, at Ayodhya, Uttar Pradesh. His father Syed Yahya (????? ???? ????), who traded in Pashmina, and his grand father, Syed Abdul Latif (????? ???? ????), first migrated from Khorasan, north-eastern Iran, to Lahore, and thereafter settled in Ayodhya, in Awadh.At age forty, he left Ayodhya for Delhi, where he became the disciple of Khwaja Nizamuddin Auliya (????? ???? ????), it was here that he stayed for the rest of his life as his murid (disciple) , and eventually after his death, became his successor. In time, he also became a known poet in Persian language
He died in 17 Ramzan 757 Hijri or 1356 AD.at the age of 82, and is buried in a part of Delhi, India which is known as "Chirag-e-Delhi" after him . Hazrat Khwaja Nasiruddin, like his predecessors, also belonged to a noble heritage although historians differ in their points of view regarding his lineage. "Khazinat-ul-Aulia" states that he is a descendant the illustrious Hazrat Imam Husain while others state that he is a descendant of Hazrat Umar ibn Khatab the second Caliph of the Holy Prophet.
The Chishtia silsila which had begun with Hazrat Khwaja Moinuddin Chishti in 587 AH came to its end with the demise of Hazrat Nasiruddin Chiragh of Delhi (his 5th Spiritual Successor).