Planeptune Basilicom is the central administrative building in the city of Planeptune, which is one of the major locations in the Neptunia game series. It serves as the headquarters for the CPU of Planeptune, Neptune, and is a hub for various activities, including governance and planning for the region. The Basilicom is characterized by its distinct architecture and vibrant atmosphere, reflecting the whimsical nature of the Neptunia universe. It is often depicted as a place where citizens can seek assistance and where important decisions regarding the welfare of Planeptune are made.