Hassan Farhang Ansari (born 1970) is an Iranian Islamic scholar and Visiting Professor of Islamic Law and Theology at the Institute for Advanced Study. He is known for his works on Islamic theology, philosophy, law, and legal theory. He is a co-editor of Shii Studies Review.

Works L’imamat et l’Occultation selon l’imamisme Accusations of Unbelief in Islam: A Diachronic Perspective on Takfīr The Zaydi Reception of Bahshamite Mu'tazilism Yemeni Manuscript Cultures in Peril

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