I could not find more than a notice on this (heavily restored) mosque, which has a medrese nearby:

Orucbey Kızı Sittihatun Camii 1459-1460.

The mosque is part of a small complex that was built in 1460, commissioned by Sitti Hatun, a daughter of Oruç Bey, the second son of Kara Timurtaş Paşa. The latter was grandson of Aygut Alp (a famous comrade of Osman Gazi, the namesake of the Ottoman dynasty) and was appointed ‘beylerbeyi’ (governor) by Murat I. His son Oruç Bey was the first known court historian of the Ottomans; his daughter Sitti Hatun became the first wife of Zağanos Mehmed Paşa, a life-long companion of Fatih Sultan Mehmet II, with an impressive career as tutor, army commander, Grand Vizier and Governor. No wonder his wife had some money to spend on community service.
The Sitti Hatun Mosque is also called ‘Kanberler Camii’ (Mosque of the Kamberler neighbourhood).

On the picture: One of the murals, using vegetal motifs around a vase. The style is a free and plain interpretation of the Ottoman wall paintings called ‘kalem işi’ (= work of the pen/paintbrush); they were inspired on the geometric or stylised ornamentation used by Ottoman calligraphers to illuminate books.

Correspondent: J.M.Criel, Antwerpen.
Sources: ‘Vakıf Abideler ve eski Eserler (volume III)’ - Vakıflar Genel Müdürlüğü, Ankara 1983 & Wikipedia.