Territorial evolution of the Ottoman Empire
Suleiman I ( "Süleymān", ; almost always "Kanuni Sultan Süleyman") (6 November 1494  – 5/6/7 September 1566), was the tenth and longest-reigning Sultan of the Ottoman Empire, from 1520 to his death in 1566. Suleiman became a prominent monarch of 16th century Europe. Suleiman personally led Ottoman armies to conquer the Christian strongholds of Belgrade, Rhodes, and most of Hungary. In 1541 he annexed central Hungary while Transylvania became an Ottoman vassal. However rest of the Kingdom of Hungary including western and northern (Upper) Hungary and Croatia still were Habsburgs possessions. Suleiman also conquered Iraq in his conflict with the Safavid dynasty. Under his rule, the Ottoman fleet dominated the seas from the Mediterranean to the Red Sea and the Persian Gulf.
Tomb of Suleyman Shah
Suleyman Shah (c. 1178–1236) was, according to some but not all Ottoman genealogies, the grandfather of Osman I (d. 1323/4), the founder of the Ottoman Empire. Suleyman Shah is believed to have drowned in the Euphrates river near castle Qal'at Ja'bar in present-day Raqqa Governorate, Syria, and was according to legend buried near that castle, in a tomb.