The Bohemian crown jewels, also called the Czech crown jewels, include the Crown of Saint Wenceslas, the royal orb and sceptre, the coronation vestments of the Kings of Bohemia, the gold reliquary cross, and St. Wenceslas' sword. They were originally held in Prague and Karlštejn Castle, designed in the 14th century by Matthias of Arras. Since 1791 they have been stored in St. Vitus Cathedral at Prague Castle. Reproductions of the jewels are permanently exhibited in the historical exposition at the former royal palace in the castle. The crown was made for the coronation of Charles IV in 1347, making it the fourth oldest in Europe.

Frederick V was the Elector Palatine of the Rhine in the Holy Roman Empire from 1610 to 1623, and reigned as King of Bohemia from 1619 to 1620. He was forced to abdicate both roles, and the brevity of his reign in Bohemia earned him the derisive sobriquet "the Winter King".