Inayat Khan Rehmat Khan was an Indian professor of musicology, singer, exponent of the saraswati vina, poet, philosopher, and pioneer of the transmission of Sufism to the West. At the urging of his students, and on the basis of his ancestral Sufi tradition and four-fold training and authorization at the hands of Sayyid Abu Hashim Madani of Hyderabad, he established an order of Sufism in London in 1914. By the time of his death in 1927, centers had been established throughout Europe and North America, and multiple volumes of his teachings had been published.

The Chishti order is a Sufi order of Sunni Islam named after the town of Chisht where it was initiated by Abu Ishaq Shami. The order was brought to South Asia by Mu'in al-Din Chishti in the city of Ajmer.