Corps de logis
Corps de logis (French pronunciation: [kɔʁ də lɔʒi]) is an architectural term referring to the principal block of a large, usually classical, mansion or palace. It contains the principal rooms, state apartments and an entry. The grandest and finest rooms are often on the first floor above the ground level: this floor is the piano nobile.
The corps de logis is usually flanked by lower secondary wings. When the secondary wings form a three sided courtyard, the courtyard is known as the Cour d'Honneur.
In France, the principal block of medieval castles and manor houses is often referred to as the corps de logis.