The Abbey of Nivelles was a former Imperial Abbey of the Holy Roman Empire founded about 648-649 AD by the widow of Pepin of Landen, Itta of Metz, along with her daughter, Gertrude of Nivelles. The abbey began as a community of nuns; they were joined later by Irish monks from the Abbey of Mont Saint-Quentin, sent by Abbot Foillan to give support to the nuns. A group of the monks settled at Nivelles and it soon became a double monastery, led either by an abbot and abbess, later only by an abbess. At that point, the abbey came under the influence of Irish monasticism, with its heavy emphasis on a severe asceticism.
In the 9th century there began a process of secularization of the community which possibly ended in the 12th century. The abbey had close ties to the royal family, and played an important role in the social life of the palace. From the 12th century, the character of the community began to change to a more prestigious one, so that the members became canonesses regular who came from among the nobility, as attested in a document dated 1462. For most of the Middle Ages the Abbey remained an Imperial Abbey, a semi-sovereign institution directly under the king.
The abbey was suppressed after the invasion of the Duchy of Brabant in 1794 by the armies of the First French Republic.
The old abbey church, which became the Collegiate Church of Saint Gertrude under the canonesses, was gutted by aerial bombs dropped by the German Luftwaffe in May 1940 during the Battle of Belgium, but it was restored to its 11th and 13th centuries form after World War II. The site was excavated in 1941 and 1953.
Today the basement of the old abbey holds a number of artifacts and a rich archaeology and is open to the public. The adjoining Romanesque-Gothic cloister dates from the 13th century. A procession is held every year on the Sunday after Michaelmas.
References:Ogrodzieniec Castle is a ruined medieval castle originally built in the 14th–15th century by the W³odkowie Sulimczycy family. Established in the early 12th century, during the reign of Boles³aw III Wrymouth, the first stronghold was razed by the Tatars in 1241. In the mid-14th century a new gothic castle was built here to accommodate the Sulimczycy family. Surrounded by three high rocks, the castle was well integrated into the area. The defensive walls were built to close the circuit formed by the rocks, and a narrow opening between two of the rocks served as an entrance.
In 1470 the castle and lands were bought by the wealthy Cracovian townsmen, Ibram and Piotr Salomon. Then, Ogrodzieniec became the property of Jan Feliks Rzeszowski, the rector of Przemy¶l and the canon of Cracow. The owners of the castle about that time were also Jan and Andrzej Rzeszowskis, and later Pilecki and Che³miñski families. In 1523 the castle was bought by Jan Boner.