Château d'Herbeys, Château in Herbeys, Isère, France.

The Château d'Herbeys is a former fortified house of the 14th century, rebuilt after 1678 for the Le Camus family. Its central square tower, the Tour Carrée, is covered with a four-sided slate dome topped by a small cupola. The light facade has rows of rectangular windows, two conical-roofed turrets flank a central section, and a 17th-century wrought-iron balcony with a mask, mitre and episcopal crozier was moved to the south face in 1900.

Lantelme de Commiers built the Tour Carrée, the present central part, at the start of the 14th century beside the church. Bishop Aimon I de Chissé of Grenoble bought it on 20 January 1393 and it was renamed castrum novum in October 1407. Aymon II de Chissé, bishop from 1428 to 1450, made it a more comfortable dwelling and had the ceiling painted in oil. It remained an episcopal residence until the Revolution.

The castle is nicknamed "the house of the bishops" because it served as the episcopal residence of the Bishops of Grenoble from 1343 until the Revolution. The Italian-style salon known as the Dome, with its trompe-l'œil decorations, and the dining room have been classified as monuments historiques since 1949, while the first-floor salon ceiling is inscribed.

The castle has been privately owned since 1998 and is not open for interior visits, but it remains visible from the departmental road. Visitors can view its distinctive exterior and dome from the roadside without needing to enter the grounds.

The wrought-iron balcony on the south facade, moved there in 1900, carries a mask, a bishop's mitre and a crozier in its centre. The dome room's trompe-l'œil decorations are among the castle's protected features.