Badr al-Molouk Qajar or Malek Taj Firouz, (1853, Tehran – November 4, 1932, Najaf) nicknamed Najm al-Saltaneh (Persian: نَجم‌السلطنه) was an Iranian princess of the Qajar dynasty and the founder of the first modern hospital in Tehran, Najmieh Hospital.

[1] Najm founded Najmieh Hospital in 1926, with the building opening in 1927.

[2][3] Najm was the daughter of Nosrat-od-Dowleh Firouz Mirza and Homa Khanum,[3] sister of Prince Abdol-Hossein Farman Farma (1852–1939), a prominent politician of modern Iran.

[3] She was also a great friend, cousin and sister-in-law of Princess Fatima Khanum Izzat al-Dawlah, one of the most educated daughters of Mozaffar ad-Din Shah Qajar (1907-1853).

She was also active in social affairs as her mother built schools and mosques.