Unlike other cities along the Adriatic coast, which were established by Greeks, Illyrians and Romans, Šibenik was founded by Croats. Excavations of the castle of Saint Michael, have since proven that the place was inhabited long before the actual arrival of the Croats. It was mentioned for the first time under its present name in 1066 in a Charter of the Croatian King Petar Krešimir IV and, for a period of time, it was a seat of this Croatian King. For that reason, Šibenik is also called "Krešimirov grad" (Krešimir's city). It is the oldest native Croatian town on the eastern shores of the Adriatic.