The Tholos of Delphi is a circular building located in the ancient sanctuary of Delphi, Greece. It was constructed around 380-360 BCE and is known for its unique architectural design, featuring 20 columns in the Doric style. The Tholos served as a place for gatherings and rituals, possibly related to the worship of the goddess Apollo. This structure is part of the larger archaeological site of Delphi, which was considered the center of the world in ancient Greek mythology. The Tholos is often associated with the Delphic Oracle, where priests would deliver prophecies. Today, it remains a significant symbol of ancient Greek culture and architecture.