The Cathedral of the Most Holy Savior and Saints John the Baptist and Evangelist in the Lateran, also known as Papas Archbasilica of Saint John in the Lateran, is a parish church located in the city of Rome and serving as the seat of the Roman Pontiff. It is the oldest and highest-ranked of the four major papal basilicas, and bears the unique nickname "Archbasilica". It is the oldest public church in the city of Rome, and the oldest church in the Western world as a whole. The cathedral is distinguished by its very beautiful design, in terms of carved Roman ceilings, marble floors, and huge golden domes.