Gülçiçek Hatun (Ottoman Turkish: گلچیچک خاتون; "rose blossom", c. 1335 - c. 1400) was a Greek woman from Bithynia[1] who became a concubine of Ottoman Sultan Murad I and Valide Hatun to their son Bayezid I.
[2] According to a tradition, Gülçiçek was a concubine of Aclan Bey, one of the Princes of the Anatolian Muslim Principality of Karasids.
She appointed her son Yahşi as trustee for an endowment deed she made for a Dervish Monastery.
In her lifetime she established a religious and charitable foundation which demonstrated her Muslim piety publicly.
With its revenues she built a mosque, the first Ottoman concubine to build one, and a tomb in Bursa where she was buried when she died, around 1400.