edifice,
building a structure that has a roof and walls and stands more or less permanently in one place; "there was a three-story building on the corner"; "it was an imposing edifice"
theater -
a region in which active military operations are in progress; "the army was in the field awaiting action"; "he served in the Vietnam theater for three years"
region a knowledge domain that you are interested in or are communicating about; "it was a limited realm of discourse"; "here we enter the region of opinion"; "the realm of the occult"
theater of war,
theatre of war the entire land, sea, and air area that may become or is directly involved in war operations
theater -
A place or building, consisting of a stage and seating, in which an audience gathers to watch plays, musical performances, public ceremonies, and so on.
theater -
A region where a particular action takes place; a specific field of action, usually with reference to war.