Wawel Castle was built by King Casimir III the Great and is part of the Historic Center of Krakow, a UNESCO World Heritage Site since 1978. Due to plenty of rebuilding work over the centuries, the building represents a number of different architectural styles, including medieval, renaissance, and baroque. Guests can visit the sumptuously decorated State Rooms and royal apartments, or visit several of the other unique exhibitions, including the Crown Treasury which holds the Polish Crown Jewels, and the Oriental Art exhibition which is home to the largest collection of Ottoman tents in Europe.