Merkinė is a town in the Dzūkija National Park in Lithuania, located at the confluence of the Merkys, Stangė, and Nemunas rivers. Merkinė is one of the oldest settlements in Lithuania. The first settlers inhabited the confluence of Merkys and Nemunas in the 9th-10th century BC, at the end of the Paleolithic. On top of Merkinė hill-fort stood one of the most important Lithuanian castles, built in the 13th century, which guarded against invasions of the Teutonic Order. Merkinė was a part of a strategic triangle - Kaunas - Vilnius - Merkinė, protected with the chains of hillforts and castles. The center of Merkinė town is a state-protected urbanistic monument. Merkinė is an important point of Lithuania's domestic tourism.

Władysław IV Vasa or Ladislaus IV of Poland was King of Poland, Grand Duke of Lithuania and claimant of the thrones of Sweden and Russia. Born into the House of Vasa as a prince of Poland and of Sweden, Władysław IV was the eldest son of Sigismund III Vasa and Sigismund's first wife, Anna of Austria.