English: hakim nezari s tomb Hakīm Sa'd-al-Dīn ibn Shams-al-Dīn Nizārī Bīrjandī Quhistānī or simply Nizari Quhistani (died 1320 CE), was a 13th-century Ismaili author and poet, who lived in the time of the Imam Shams al-Din Muhammad. Nizari was born into a family of landed gentry approximately a decade after the capitulation of the Alamut state and hailed from the town of Birjand. Nizari is the only Ismaili poet of this period whose works are extant.