The title "King of Hungary" refers to the monarch who ruled over the Kingdom of Hungary, a historical state in Central Europe. The kingdom was established in the year 1000 AD, with Stephen I being the first king. Throughout its history, the title was held by various dynasties, including the Árpád dynasty and the Habsburgs, until the end of the monarchy in 1946. The role of the king included governing the realm, overseeing laws, and leading military campaigns. The kingdom experienced significant events, such as the Mongol invasion in the 13th century and the Ottoman conquest in the 16th century, which shaped its history and influence in Europe.