Founded in c. 1020 by Guillaume de Bellême known as 'Talvas', Lonlay Abbey was originally occupied by the monks of Saint-Benoît-sur-Loire. Interpolated between the Gothic choir and porch, there are no more remains of the Romanesque edifice than the transept whose lower and middle sections show some signs of fishbone bonding, and date back to the end of the 11th century or beginning of the 12th century.
Unlike the very austere capitals in granite on the first level of the floors, in line with the geometric tendencies of the end of the 11th century, the eleven capitals of small columns located between the transept and the choir form an original collection within the corpus of Norman Romanesque sculpture, which has no equivalent except in the priory of Goult, a dependency of the abbey of Lonlay. These were created in c. 1090 in a white limestone which is different to that of Caen - mostly used in Romanesque sculpture in Normandy - and are decorated with ornamental motifs or figured scenes which are often original.References:
The Petersberg Citadel is one of the largest extant early-modern citadels in Europe and covers the whole north-western part of the Erfurt city centre. It was built after 1665 on Petersberg hill and was in military use until 1963. It dates from a time when Erfurt was ruled by the Electors of Mainz and is a unique example of the European style of fortress construction. Beneath the citadel is an underground maze of passageways that can be visited on guided tours organised by Erfurt Tourist Office.
The citadel was originally built on the site of a medieval Benedictine Monastery and the earliest parts of the complex date from the 12th century. Erfurt has also been ruled by Sweden, Prussia, Napoleon, the German Empire, the Nazis, and post-World War II Soviet occupying forces, and it was part of the German Democratic Republic (East Germany). All of these regimes used Petersberg Citadel and had an influence on its development. The baroque fortress was in military use until 1963. Since German reunification in 1990, the citadel has undergone significant restoration and it is now open to the public as a historic site.