area enclosed withina defensive works main line of ramparts, but excluding its outworks.

the main works of fortification—walls, ramparts, and parapets—forming the primary enclosure of a fort or fortress.

(Fr.) - "body of the place," area of a fort or redoubt enclosed by the parapet.

Enceinte (Lat. in, within, cinctus, girdled; to be distinguished from the word meaning pregnant, from in, not, and cinctus, i.e. with girdle loosened), is a French term used technically in fortification for the inner ring of fortifications surrounding a town. Strictly, the term was applied to the continuous line of bastions and curtains forming the body of the place, this last expression being often used as synonymous with enceinte. The outworks, however, close to the enceinte were not considered as forming part of it.

The wall around the old city of Paris.

An enclosure; the fortified area of a castle