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.
Monte d"Accoddi is a Neolithic archaeological site in northern Sardinia, located in the territory of Sassari. The site consists of a massive raised stone platform thought to have been an altar. It was constructed by the Ozieri culture or earlier, with the oldest parts dated to around 4,000–3,650 BC.
The site was discovered in 1954 in a field owned by the Segni family. No chambers or entrances to the mound have been found, leading to the presumption it was an altar, a temple or a step pyramid. It may have also served an observational function, as its square plan is coordinated with the cardinal points of the compass.
The initial Ozieri structure was abandoned or destroyed around 3000 BC, with traces of fire found in the archeological evidence. Around 2800 BC the remains of the original structure were completely covered with a layered mixture of earth and stone, and large blocks of limestone were then applied to establish a second platform, truncated by a step pyramid (36 m × 29 m, about 10 m in height), accessible by means of a second ramp, 42 m long, built over the older one. This second temple resembles contemporary Mesopotamian ziggurats, and is attributed to the Abealzu-Filigosa culture.
Archeological excavations from the chalcolithic Abealzu-Filigosa layers indicate the Monte d"Accoddi was used for animal sacrifice, with the remains of sheep, cattle, and swine recovered in near equal proportions. It is among the earliest known sacrificial sites in Western Europe.
The site appears to have been abandoned again around 1800 BC, at the onset of the Nuragic age.
The monument was partially reconstructed during the 1980s. It is open to the public and accessible by the old route of SS131 highway, near the hamlet of Ottava. It is 14,9 km from Sassari and 45 km from Alghero. There is no public transportation to the site. The opening times vary throughout the year.