Gülşah Hatun Türbesi. Gülşah Hatun was a wife of Mehmet the Conqueror and the mother of Prince Mustafa. It was built while Gülşah Hatun was alive, she died in 1487. Inside are two marble tombs, the one right of the entrance is that of Gülşah Hatun, the identity of the person in the other is unknown. The mausoleum was restored in 2013.