The Memoirs of Jahāngīr (Jahāngīrnāma) 7.3.6

7.3.6

At the time when Yildirim Bayazid was taken prisoner by his victorious army, a Nazarene, who at that time was ruler of Constantinople, had sent an ambassador with gifts and presents in token of submission and service, and an artist who had been sent with the ambassador took his likeness and brought it away. If this story were true, no better gift could be presented to me. But as the picture had no resemblance to any of his descendants I was not satisfied of the truth of the statement.