Mohammad-Reza Shajarian (Persian: محمدرضا شجريان; Persian pronunciation: [mohæmːæd ɾeˈzɒː ʃædʒæɾiˈɒːn], 23 September 1940 – 8 October 2020) was an Iranian singer and master (Ostad) of Persian traditional music. He was also known for his skills in Persian calligraphy and humanitarian activities.Shajarian started his singing career in 1959 at Radio Khorasan, rising to prominence in the 1960s with his distinct singing style. His main teachers were Ahmad Ebadi, Esmaeil Mehrtash, Abdollah Davami, and Nour-Ali Boroumand. He also learned the vocal styles of singers from previous generations, including Reza Gholi Mirza Zelli, Fariborz Manouchehri, Ghamar Molouk Vaziri, Eghbal Azar, and Taj Isfahani. He has cited legendary Persian tar soloist Jalil Shahnaz as highly influential to his development,