Château de Passy

The château occupies a U‑shaped plan centered on a long main block with a classical pediment above its principal façade, and two wings that project eastward to frame an entrance court in front of the house. This arrangement creates a formal space at the front of the building that was designed to receive visitors and carriages. The principal block dates to the 17th century and retains the overall classical composition typical of that period.

The west side of the house looks out across what remains of the former park and toward the Yonne river. A turret rises at the southwest corner of the structure, marking a vertical accent on that angle. Interior spaces have been substantially altered during later conversions, but one staircase from the original period survives in place.

To the right of the entrance court a group of service buildings are laid out as a four‑sided range around a large square yard, forming a separate courtyard used historically for estate work and circulation. Access to the estate is through a gate that originally controlled a crossing over moats with a drawbridge; these defensive and ceremonial features are recorded as part of the site’s historic arrangement. A long avenue lined with trees leads from the approaching road directly to the entrance court, reinforcing the formal axis into the property.

The ensemble has seen successive reuse and repair: it was adapted to serve as a wartime hospital in the early 20th century, later accommodated a holiday camp, and was rehabilitated and parceled into private apartments around the turn of the 21st century. The main building received legal protection as a historic monument in 1926. The outbuildings were restored and sold as individual residential lots. Today the grouped buildings and court layouts survive as a converted residential estate, with the period staircase remaining as an in situ interior feature.