Khusrow is regarded as the "father of qawwali" (a devotional music form of the Sufis in the Indian subcontinent), and introduced the ghazal style of song into India, both of which still exist widely in India and Pakistan. Khusrow was an expert in many styles of Persian poetry which were developed in medieval Persia, from Khāqānī's qasidas to Nizami's khamsa. He used 11 metrical schemes with 35 distinct divisions. He wrote in many verse forms including ghazal, masnavi, qata, rubai, do-baiti and tarkib-band. His contribution to the development of the ghazal was significant.