| Nasrollah Pirnia Persian: نصرالله مشیرالدوله | |
| Office1: | Premier of Iran |
| Term Start1: | 30 July 1906 |
| Term End1: | 7 March 1907 |
| Monarch1: | Mozaffar ad-Din Qajar Mohammad Ali Qajar |
| Successor1: | Soltan-Ali Vazir-e Afkham |
| Office2: | Minister of Foreign Affairs |
| Term Start2: | 9 August 1899 |
| Term End2: | 29 July 1906 |
| Monarch2: | Mozaffar ad-Din Qajar |
| Premier2: | Ali Asghar Atabak Abdol Majid Mirza |
| Predecessor2: | Mohsen Mazaher |
| Successor2: | Mohammad-Ali al-Saltaneh |
| Birth Date: | 17 October 1840 |
| Birth Place: | Nain, Iran |
| Death Place: | Tehran, Iran |
| Resting Place: | Imamzadeh Saleh |
| Party: | Independent |
| Spouse: | Hosnieh Ghods-e Dowleh |
| Children: | Hassan Hossein Ali Zahra |
Nasrollah Pirnia, also known as Mirza Nasrollah Khan (Persian: میرزا نصرالله خان نایینی; 17 October 1840 – 13 September 1907, titled Moshir al-Dowleh), was the first Iranian Prime Minister. He became Premier of Iran following the introduction of the Persian Constitution of 1906, establishing Iran's first legitimate government approved by the Majlis on 7 October 1906. Before becoming Prime Minister, he had served as the Minister of Foreign Affairs. He died in circumstances said to be suspicious and was buried in Imamzadeh Saleh of Tajrish.
Moshir ad-Dowleh Mansion belonged to him and his children.[1]
Born in 1840 to a family of religious leaders, he grew up in Nain before later travelling to Tehran. In 1862 he married Hosnieh, daughter of a wealthy merchant named Mirza Taghi Ajudan. Two of their children, Hassan and Hossein, would later draft the Persian Constitution of 1906 and play key roles in Iranian politics during the later Qajar period. Nasrullah, working his way up through the ranks of government, became the Minister of Foreign Affairs in 1898.
Nasrullah became the Premier of Iran under the new Iranian Constitution of 1906. Although he resigned on 17 March 1907, his cabinet remained in place until 1 May 1907. After Nasrullah's death, his eldest son Hassan Pirnia inherited the title of Moshir al-Dowleh before also serving as Prime Minister the following decade.
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