A dome is a rounded structure that is often used in architecture. It resembles the shape of a half-sphere and can be found on buildings like churches, mosques, and government structures. Domes are designed to distribute weight evenly, allowing them to cover large spaces without the need for internal supports. One famous example of a dome is the Pantheon in Rome, which has a large oculus at its center. Domes can be made from various materials, including concrete, wood, and metal, and they are appreciated for their aesthetic appeal as well as their structural integrity.