Wiślica has existed since at least the 9th century. According to legend, the settlement was named after its founder, the Vistula prince Wiśimir, who, together with his entourage, was said to have been baptised in 880. Around 990, the castle fell into the hands of the Polans. At this time, Wiślica became one of the most important administrative centres in Lesser Poland, alongside Kraków and Sandomierz. At the turn of the 10th and 11th century, the first castle church was established in Wiślica. At the beginning of the 11th century. Bolesław Chrobry erected a defensive stronghold near the market settlement, whose task was to guard the crossing over the Nida River. A trade route leading from Prague and Kraków to Kievan Rus ran through Wiślica. The Collegiate Basilica of the The collegiate basilica of the Nativity of the Blessed Virgin Mary, built thanks to the foundation of King Casimir the Great, is the oldest and largest two-nave church in Poland. The main altar contains a statue of the Virgin Mary (the so-called Madonna of the Lokietek) dating from around 1300. The basilica's vaults contain the remains of two earlier Romanesque churches dating back to the 12th and 13th centuries, as well as a unique Orant Plate, dating from 1175 and representing a magnificent example of Romanesque art. The Baptismal Bowl - a clay and gypsum basin used for collective baptisms dated probably to 880. Dlugosz House - a curate's house from 1460. A brick building founded by the famous historian and chronicler Jan Dlugosz as a dwelling for the curates of the Collegiate Church of Wenceslas. Fragments of polychrome from the 15th century have been discovered in the interior.