This paper will discuss the creation of Edirne Old Palace by the Ottoman dynasty in the first half of the fifteenth century. Although the local Ottoman sources scarcely mention this palace, the travelogs and letters of contemporary European travelers explicate its inner structure. According to these reports, existence of the ceremonial courtyard and the Chamber of Petitions in Edirne Old Palace is proved. Prior to the construction of Topkapi Palace in Istanbul built during1460s, Edirne Old Palace provided the prototype for subsequent premodern Ottoman palaces.