The Château d'Ambleville is a French Renaissance style château located within the regional park of Vexin. The gardens are classified among the Notable Gardens of France.
The château was built in the 16th century for the seigneurs of Ambleville and Villarceaux by architect Jean Grappin, on the foundations of a medieval castle on the banks of the Aubette. In the 17th century, the house was acquired by the Duke of Villeroy, Nicolas V, the Ambassador of France to Medicis. He created a garden in the Florentine style. The house was purchased in 1893 by Charles Sedelmeyer (1837–1925), who restored the chateau and added a theater and Venetian chimneys and balconies. In 1928 the new owner, the Marquise de Villefranche, remade the gardens after those of the recently restored gardens of the Villa Gamberaia in Florence. Today they offer one of the best examples of an Italian Renaissance garden in France.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.