The 23rd death anniversary of legendary ‘Qawwali’ maestro Nusrat Fateh Ali Khan was observed here on Sunday across the country. He was popularly regarded as ‘Shahenshah-e-Qawwali’, meaning ‘The King of Qawwali’, a private news channel; reported. Nusrat Fateh Ali Khan was born in Faisalabad on October, 13, 1948, and was considered one of the trend-setters and pioneers of fusion music in Pakistan. Hailing from a Patiala gharana, Khan carried forward his family’s 600-year-old Qawwali tradition and introduced it to international audiences. According to the Guinness Book of World Records‚ Nusrat Fateh Ali Khan holds the world record for the largest recorded output by a Qawwali artist.