Hohenberg Castle, situated adjacent to Czech Republic border, was built in the Hohenstaufen period between 1170 and 1220 to protect the important Schirndinger Pass. Around 1300 Hohenberg came to the possession of burgraves from Nuremberg. in 1433, Hans von Kotzau defended Hohenberg against the Hussites.
The present castle was built mainly (ring wall, round towers) in the period around 1480. In the years 1499 and 1504 was reported by the construction of the outer bailey. In the years 1621 and 1622 Margrave Christian had massive, provided with seven bastions earthen walls around the castle, which were additionally fortified with palisades . However, these precautions did not help much, as in June 1632 imperial troops took the pass from Schirnding, conquered the Hohenberg and occupied it for three years. After the Thirty Years War, Hohenberg Castle lost its strategic importance.
Since 2017, Hohenberg castle has been extensively renovated and used as a youth hostel as well as for meetings.
The castle is surrounded by the ring wall built around 1480 on an irregular hexagonal floor plan, which is additionally attached to the corner points by the gatehouse, three round gun turrets and the square prison tower. A fourth round tower was abandoned in the 19th century. From the medieval interior is nothing left. The so-called princely house was built by Margrave Christian Ernst in 1666 as a town hall and hunting lodge. Other buildings inside the castle were demolished in the 19th century. A remnant of the earthwork from the years 1621/22 has survived.
The Château de Chaumont was founded in the 10th century by Odo I, Count of Blois. The purpose was to protect his lands from attacks from his feudal rivals, Fulk Nerra, Count of Anjou. On his behalf the Norman Gelduin received it, improved it and held it as his own. His great-niece Denise de Fougère, having married Sulpice d'Amboise, passed the château into the Amboise family for five centuries.
Pierre d'Amboise unsuccessfully rebelled against King Louis XI and his property was confiscated, and the castle was dismantled on royal order in 1465. It was later rebuilt by Charles I d'Amboise from 1465–1475 and then finished by his son, Charles II d'Amboise de Chaumont from 1498–1510, with help from his uncle, Cardinal Georges d'Amboise; some Renaissance features were to be seen in buildings that retained their overall medieval appearance. The château was acquired by Catherine de Medici in 1550. There she entertained numerous astrologers, among them Nostradamus. When her husband, Henry II, died in 1559 she forced his mistress, Diane de Poitiers, to exchange Château de Chaumont for Château de Chenonceau which Henry had given to de Poitiers. Diane de Poitiers only lived at Chaumont for a short while.
Later Chaumont has changed hands several times. Paul de Beauvilliers bought the château in 1699, modernized some of its interiors and decorated it with sufficient grandeur to house the duc d'Anjou on his way to become king of Spain in 1700. Monsieur Bertin demolished the north wing to open the house towards the river view in the modern fashion.
In 1750, Jacques-Donatien Le Ray purchased the castle as a country home where he established a glassmaking and pottery factory. He was considered the French "Father of the American Revolution" because he loved America. However, in 1789, the new French Revolutionary Government seized Le Ray's assets, including his beloved Château de Chaumont.
The castle has been classified as a Monument historique since 1840 by the French Ministry of Culture. The Château de Chaumont is currently a museum and every year hosts a Garden Festival from April to October where contemporary garden designers display their work in an English-style garden.