Matthias Corvinus (23 February 1443 – 6 April 1490), also called the Just in folk tales, was King of Hungary (as Matthias I) and Croatia from 1458, at the age of 14 until his death. After conducting several military campaigns he became also King of Bohemia (1469–1490), and Duke of Austria (1486–1490). With his patronage Hungary became the first European country which adopted the Renaissance from Italy. As a Renaissance ruler, he established education institutions, patronized art and science, and introduced a new legal system in the Kingdom of Hungary. In the era of his kingship, Matthias strongly endeavored to follow the model and ideas of the philosopher-king as described in Plato’s Republic.