A dome ceiling is a curved architectural feature that creates a rounded top in a room. It is often used in buildings like churches, museums, and homes to add a sense of grandeur and spaciousness. The shape helps distribute weight evenly, allowing for larger open spaces without the need for many supporting columns. Dome ceilings can be made from various materials, including plaster, wood, or concrete. They may be adorned with decorative elements such as molding or paintings, enhancing the aesthetic appeal. Famous examples include the Pantheon in Rome and the St. Peter's Basilica in Vatican City.