On the picture: The northeast minaret, which has been added by sultan Mehmet I Çelebi during the second decade of the 15th century. It stands on a square foot (unlike the octagonal foot of the other minaret).
Correspondent: J.M.Criel, Antwerpen.
Source: ‘Vakıf Abideler ve eski Eserler III’ - Vakıflar Genel Müdürlüğü, Ankara 1983 .