Gīāṭ al-dīn Bāysonḡor, commonly known as Baysonqor or Baysunghur or (incorrectly) as Baysunqar, also called Sultan Bāysonḡor Bahādor Khan (1397, Herat - 1433, the Bāḡ-e Safīd palace near Herat) was a prince from the house of Timurids. He was known as a patron of arts and architecture, as well as a prominent calligrapher.