Wewelsburg castle is perched atop a wooded slope close to Paderborn's airport. The fortification Wifilisburg was used during the 9th and 10th centuries against the Hungarians. The next castle was demolished in 1123/24 by revolting peasants. From 1301 to 1589, the Prince-Bishops of Paderborn assigned the estate to miscellaneous liege lords.
The masonry of both predecessor buildings was integrated in the current triangular Renaissance castle. In its current form, the Wewelsburg was built from 1603 to 1609 as secondary residence for the Prince-Bishops of Paderborn. Wewelsburg was taken several times during the Thirty Years' War. In 1646 it was occupied and then razed by Swedish troops – namely by the army commanded by General Carl Gustav Wrangel. After 1650, the mostly destroyed castle was rebuilt by Prince-Bishop Theodor Adolf von der Recke and his successor Ferdinand von Fürstenberg. He carried out some architectural changes; the three towers of the castle got their Baroque style domes.
During the Seven Years' War (1756–1763), the basement rooms were probably used as a military prison. In the 18th and 19th centuries the castle fell progressively into ruin. In 1802, during German mediatisation the castle came into the possession of the Prussian state . On 11 January 1815, the North Tower was gutted by a fire that was started by a lightning strike; only the outer walls remained. From 1832 to 1934, a rectory existed in the eastern part of the south wing of the castle.
In 1924, the castle became the property of the district of Büren and was changed into a cultural center. By 1925, the castle had been renovated into a local museum, banquet hall, restaurant and youth hostel. During the Nazi regime Wewelsburg was used a school for SS organisation, focusing to pseudo-scientific research in the fields of Germanic pre- and early history, medieval history, folklore and genealogy.
Today Wewelsburg hosts a Historical Museum of the Prince Bishopric of Paderborn, Wewelsburg 1933-1945 Memorial Museum and temporary exhibitions.
The Palazzo Colonna is a palatial block of buildings built in part over ruins of an old Roman Serapeum, and has belonged to the prestigious Colonna family for over twenty generations.
The first part of the palace dates from the 13th century, and tradition holds that the building hosted Dante in his visit to Rome. The first documentary mention notes that the property hosted Cardinal Giovanni and Giacomo Colonna in the 13th century. It was also home to Cardinal Oddone Colonna before he ascended to the papacy as Martin V (1417–1431).
With his passing, the palace was sacked during feuds, and the main property passed into the hands of the Della Rovere family. It returned to the Colonna family when Marcantonio I Colonna married Lucrezia Gara Franciotti Della Rovere, the niece of pope Julius II. The Colonna"s alliance to the Habsburg power, likely protected the palace from looting during the Sack of Rome (1527).
Starting with Filippo Colonna (1578–1639) many changes have refurbished and create a unitary complex around a central garden. Architects including Girolamo Rainaldi and Paolo Marucelli labored on specific projects. Only in the 17th and 18th centuries were the main facades completed. Much of this design was completed by Antonio del Grande (including the grand gallery), and Girolamo Fontana (decoration of gallery). In the 18th century, the long low facade designed by Nicola Michetti with later additions by Paolo Posi with taller corner blocks (facing Piazza Apostoli) was constructed recalls earlier structures resembling a fortification.
The main gallery (completed 1703) and the masterful Colonna art collection was acquired after 1650 by both the cardinal Girolamo I Colonna and his nephew the Connestabile Lorenzo Onofrio Colonna and includes works by Lorenzo Monaco, Domenico Ghirlandaio, Palma the Elder, Salviati, Bronzino, Tintoretto, Pietro da Cortona, Annibale Carracci (painting of The Beaneater), Guercino, Francesco Albani, Muziano and Guido Reni. Ceiling frescoes by Filippo Gherardi, Giovanni Coli, Sebastiano Ricci, and Giuseppe Bartolomeo Chiari celebrate the role of Marcantonio II Colonna in the battle of Lepanto (1571). The gallery is open to the public on Saturday mornings.
The older wing of the complex known as the Princess Isabelle"s apartments, but once housing Martin V"s library and palace, contains frescoes by Pinturicchio, Antonio Tempesta, Crescenzio Onofri, Giacinto Gimignani, and Carlo Cesi. It contains a collection of landscapes and genre scenes by painters like Gaspard Dughet, Caspar Van Wittel (Vanvitelli), and Jan Brueghel the Elder.
Along with the possessions of the Doria-Pamphilij and Pallavacini-Rospigliosi families, this is one of the largest private art collections in Rome.