The castle-palace of Olite was the residence of the kings and queens of the kingdom of Navarre until its union with Castile in the 16th century. It was declared a National Monument in 1925. During the 13th-15th centuries it underwent several transformations, although the most important developments took place at the time of King Charles III the Noble. Visitors can start the tour in the Old Palace, today converted into a Parador Hotel, and continue to the Gothic church of Santa María and the Romanesque church of San Pedro, with its cloister and Gothic tower crowned by a spire.