Mahsati Ganjavi (Persian: ), (born circa 1089 Ganja, a city in modern Republic of Azerbaijan—after 1159) was a 12th century Persian poet. Mahsati (?????) is a compound of two Persian words "Maah" (Moon) and "Sati" (Lady). The title appears in the works of Saadi, Nezami, Sanai,Rumi and Attar.. As an eminent poetess, she was composer of quatrains (ruba'is).Originated from Ganja, she was said to have associated with both Omar Khayyam and Nezami. She is also said to have been a companion of Sultan Sanjar. Her alleged free way of living and peddled verses have stamped her as a Persian Madame Sans-Gêne. Her purported love affairs are recounted in the works of Jauhari of Bukhara.