Amphitheaters are large, open-air venues designed for performances and events, often featuring a circular or oval shape. They were prominent in ancient civilizations, particularly in Rome and Greece, where they hosted various entertainment forms, including gladiatorial contests and theatrical performances. These structures are characterized by tiered seating that allows audiences to enjoy a clear view of the stage or arena. The design of amphitheaters not only enhances acoustics but also creates a communal atmosphere, making them a significant part of cultural heritage and social life in ancient times.