Grand Ayatollah Sheikh Murtadha al-Ansari al-Tostari (Arabic: مرتضی الأنصاري التستري‎; Persian: مرتضی انصاری شوشتری‎ ), also transliterated as Mortaza Ansari Shushtari, was a Shia jurist who "was generally acknowledged as the most eminent jurist of the time." Ansari has also been called the "first effective" model or Marja of the Shia or "the first scholar universally recognized as supreme authority in matters of Shii law".