On 6 September 1566, Suleiman, who had set out from Constantinople to command an expedition to Hungary, died before an Ottoman victory at the Siege of Szigetvár in Hungary at the age of 71 and his Grand Vizier Sokollu Mehmed Pasha kept his death secret during the retreat for the enthronement of Selim II. The sultan's body was taken back to Istanbul to be buried, while his heart, liver, and some other organs were buried in Turbék, outside Szigetvár. A mausoleum constructed above the burial site came to be regarded as a holy place and pilgrimage site. Within a decade a mosque and Sufi hospice were built near it, and the site was protected by a salaried garrison of several dozen men.