The Insomnia Citadel is a towering, regal structure that serves as the royal palace in Final Fantasy XV, located in the heart of the city of Insomnia – the capital of the Kingdom of Lucis. This massive, gothic-style fortress is both a symbol of the kingdom’s might and the seat of power for the royal family, including King Regis and later his son, Noctis. Surrounded by the urban sprawl of a technologically advanced city, the Citadel blends ancient architecture with modern design, reflecting Lucis' fusion of magic and technology. It plays a central role in the game’s story, especially during the invasion by Niflheim forces that marks a turning point in the narrative.