The Wawel Royal Castle (Polish pronunciation: [ˈvavɛl] ; Zamek Królewski na Wawelu) and the Wawel Hill on which it sits constitute the most historically and culturally significant site in Poland. A fortified residency on the Vistula River in Kraków, it was established on the orders of King Casimir III the Great and enlarged over the centuries into a number of structures around an Italian-styled courtyard. It represents nearly all European architectural styles of the Medieval, Renaissance and Baroque periods.

The castle is part of a fortified architectural complex erected atop a limestone outcrop on the left bank of the Vistula River, at an altitude of 228 metres above sea level. The complex consists of numerous buildings of great historical and national importance, including the Wawel Cathedral where Polish monarchs were crowned and buried. Some of Wawel's oldest stone buildings can be traced back to 970 AD, in addition to the earliest examples of Romanesque and Gothic architecture in Poland. The current castle was built in the 14th century, and expanded over the next hundreds of years. In 1978 Wawel was declared the first World Heritage Site as part of the Historic Centre of Kraków.

For centuries the residence of the kings of Poland and the symbol of Polish statehood, Wawel Castle is now one of the country's premier art museums. Established in 1930, the museum encompasses ten curatorial departments responsible for collections of paintings, including an important collection of Italian Renaissance paintings, prints, sculpture, textiles, among them the Sigismund II Augustus tapestry collection, goldsmith's work, arms and armor, ceramics, Meissen porcelain, and period furniture. The museum's holdings in oriental art include the largest collection of Ottoman tents in Europe. With seven specialized conservation studios, the museum is also an important center for the conservation of works of art. With over 1.79 million visitors in 2022, Wawel Castle is the most visited art museum in the country and the 22nd most visited art museum in the world.