A Tholos is a circular building or structure that was commonly used in ancient Greek architecture. These structures often served as tombs, temples, or meeting places. The most famous example is the Tholos of Delphi, which was part of the ancient sanctuary dedicated to the god Apollo. Tholoi typically feature a domed roof and are constructed using stone or mud-brick. In addition to their architectural significance, tholoi are also important in archaeological studies. They provide insights into the social and cultural practices of ancient civilizations. The design and construction techniques of tholoi have influenced various architectural styles throughout history, showcasing the ingenuity of ancient builders.