Louis I of Hungary - Wikipedia
Louis the Great was King of Hungary and Croatia from 1342 and King of Poland from 1370 until his death. He was one of the most active and accomplished monarchs of the Late Middle Ages, extending territorial control to the Adriatic and securing Dalmatia, with part of Bosnia, within the Holy Crown of Hungary. Louis is the first European monarch who came into collision with the Ottoman Turks. During his reign Hungary reached the peak of its political influence.