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Origin and history

The castle of Osthoffen found its origins in the Roman conquest around 50 BC, where it served as a watchtower for the military camp of the Scharrach, located 5 km west. Its name, of German origin (Ost for "est" and Hoffen for "court"), reflects its position east of the camp. In Roman times, the site was integrated into a standardized defensive system, with dry moats and a characteristic signalling tower, visible on the Trajane Column.

In the 12th century, a medieval fortress was built on Roman foundations, preserving the layout of the moat. The castle, then plain castle without flooded ditches (Wasserschloss), was a stronghold until the 15th century. In 1400, it was destroyed in a ten-day battle led by the bishop of Strasbourg, remaining in ruins for a century. Its reconstruction at the end of the 15th century by architect Jost Von Seebach marked a change of vocation: it became an agricultural and religious center linked to the abbey of Marmoutier, while retaining defensive elements such as the walls and the dungeon.

In the 18th century, under the von Zuckmantel family, the castle lost its military functions to adopt a residential style. The inner courtyards were cut down, the facades were pierced with French windows, and the interiors were modernized. The French Revolution led to the partial destruction of the towers and medieval dungeon, by order of the authorities for the border castles. In the 19th century, the Gruvel family, owner from 1817 onwards, undertook a major restoration: the fantastic reconstruction of the dungeon, the addition of a stone bridge, and the transformation of the north tower into a staircase. General Jules Gruvel, a polytechnician, printed his personal style there.

The castle played a minor role during the 20th century wars. During World War II, he was looted by the Germans, and his family archives destroyed. The owners, the Gruvel family, restored him after 1945, despite the damage suffered during the Liberation. Today, the site preserves three successive enclosures (Roman, medieval, modern), dry ditches consolidated by foothills, and a square house with a round tower of the twelfth century. The statue of Saint Quirin, a 15th century Roman soldier, always adorns the east gable, testifying to its connection with the Abbey of Marmoutier.

Architecturally, the castle combines Roman elements (dry doves), medieval (donjon, defense towers) and classical (18th-century windows, Renaissance frontons). The outbuildings include a monumental shell fountain, a park with pond, and a family cemetery. Ranked a Historic Monument in 1963, it illustrates the evolution of a fortress as a seigneurial residence, marked by Alsatian conflicts and stylistic transformations.

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