Yakubşah bin İslamşah (15th -16th century):
The name of Yakubşah bin İslamşah was frequently mentioned in documents between 1503 and 1515, among the architects who were rewarded by Sultan Beyazid II. Yakubşah built the Beyazid Madrasah. His son, Hüdaverdi, was also known as an architect. Yakubşah had two assistants: Ali bin Abdullah and Yusuf bin Papas, who were from Devşirme.