Grand Ayatollah Sheikh Hossein Wahid Khorasani (Persian: حسین وحید خراسانی; born Mohammad-Hossein Molla-Saleh (Persian: محمدحسین ملاصالح); 1 January 1921) is an Iranian author and Shia marja'. He is the current head of the Qom Seminary. Khorasani is considered to be the most learned Shia religious authority alive.