Ottoman sultan Suleiman in 1566 formally declares Transylvania an autonomous principality under his own suzerainty.

Transylvania enters a period of broad autonomy, although it remains a vassal state of the Sublime Porte (as the Ottoman government is called).

As a vassal, the principality pays the Porte an annual tribute and provides military assistance; in return, the Ottomans pledge to protect Transylvania from external threat.