A stupa is a dome-shaped structure that serves as a Buddhist monument, typically housing relics or sacred texts. It is designed to symbolize the universe and is often used as a place for meditation and worship. Stupas can vary in size and design, but they generally feature a circular base, a dome, and a spire at the top. Stupas originated in ancient India and have spread throughout Asia, influencing various architectural styles. They are often found in Buddhist sites, such as those associated with the life of the Buddha, like the Bodh Gaya stupa, where it is believed he attained enlightenment.