Wawel Castle, a Gothic masterpiece in Kraków, was constructed at the behest of Casimir III the Great. It stands as a testament to Poland's rich history, encapsulating nearly all European architectural styles from the Medieval, Renaissance, and Baroque periods. Over the centuries, it has been the royal residence, a symbol of statehood, and now serves as a premier art museum, housing collections that span from Italian Renaissance paintings to Ottoman tents.