Armament Buildings are combat support structures designed to look like ordinary skyscrapers in the city of New Tokyo-3.
Armament Buildings are used primarily by the Evangelion Units during combat with the Angels. These structures come in various types, including those that act as missile interceptor sites, electrical sockets, weapon hangars, and elevator gates for launch and recovery. They are designed to appear like any other skyscrapers to hide them from the Angels and civilians.
Like all high-rise structures in New Tokyo-3, Armament Buildings can be lowered underground and raised to the surface only when needed.
Based on Neon Genesis Evangelion Platinum: 04 DVD Booklet