The term 'Large Brass Container' can be summarized by two crossword solutions: Pentagon (8 letters) and ThePentagon (11 letters). The Pentagon is a large, five-sided building located in Arlington, Virginia, and serves as the headquarters of the United States Department of Defense. It is one of the world's largest office buildings, with about 6, 500, 000 sq ft of space, and is a symbol of the American military. ThePentagon is an informal name for the building, which is often used in popular culture.