The Abbey Church of Notre-Dame, sometimes referred to as 'Montivilliers Abbey' dates back to 684, although it was destroyed a Viking raid in 850, and rebuilt as a church in both the Romanesque and Gothic styles. It fell into decline by the late 1700's. Its decline went up to the French revolution at the end of the 18th century when it was closed and sold. Fortunately the abbey was not destroyed and was later bought back by the city of Montivilliers. An ambitious restoration program which was completed in 2000 gave back to the abbey its splendor.
Besides the church, it now houses exhibition rooms and the cloister has regained its elegance. The plan of the abbey is a traditional one: western building mass with two towers, large un-vaulted nave, projecting transept, lantern tower and gradated tower. The older parts are located in the choir and in the base of the western mass which dates from the end of the 11th century.From the renovated refectory to the rebuilt cloisters, and from the chapter house to the dormitory, as part of a moving museum exhibit that vibrantly evokes the nuns' lives, the abbey's history and its architecture.
The Palace of the Kings of Navarre of Olite was one of the seats of the Court of the Kingdom of Navarre, since the reign of Charles III 'the Noble' until its conquest by Castile (1512). The fortification is both castle and palace, although it was built more like a courtier building to fulfill a military function.
On an ancient Roman fortification was built during the reign of Sancho VII of Navarre (13th century) and extended by his successors Theobald I and Theobald II, which the latter was is installed in the palace in 1269 and there he signed the consent letter for the wedding of Blanche of Artois with his brother Henry I of Navarre, who in turn, Henry I since 1271 used the palace as a temporary residence. This ancient area is known as the Old Palace.
Then the palace was housing the Navarrese court from the 14th until 16th centuries, Since the annexation (integration) of the kingdom of Navarre for the Crown of Castile in 1512 began the decline of the castle and therefore its practically neglect and deterioration. At that time it was an official residence for the Viceroys of Navarre.
In 1813 Navarrese guerrilla fighter Espoz y Mina during the Napoleonic French Invasion burned the palace with the aim to French could not make forts in it, which almost brought in ruin. It is since 1937 when architects José and Javier Yarnoz Larrosa began the rehabilitation (except the non-damaged church) for the castle palace, giving it back its original appearance and see today. The restoration work was completed in 1967 and was paid by the Foral Government of Navarre.