Louis the Great (5 March 1326, Visegrád – 10 September 1382, Nagyszombat/Trnava) is King of Hungary and Croatia from 1342 and King of Poland from 1370 until his death.

Louis is the head of the senior branch of the Angevin dynasty.

He is 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.

The rulers of Serbia, Wallachia, Moldavia, and Bulgaria become his vassals.

He spends much of his reign in wars with the Republic of Venice.

He is in competition for the throne of Naples, with huge military success and the latter with little lasting political results.

Louis is the first European monarch who comes into collision with the Ottoman Turks.

During his reign, Hungary reaches the peak of its political influence.