This elliptical amphitheater is considered as an engineering and architectural wonder and remains a symbol of Imperial Rome, and one of the most well known archaeological monuments on earth. It is most popular tourist attractions in Italy, and is voted as one of the seven ancient wonders of the world. Its elliptical shape measures 189 m x 156 m with the base area of 24,000 m2. The outer wall is 48 m high. The central oval arena is 287 ft x 180 ft. Above the wooden floor arena, there are other four floors, all being a complex set of rooms, passage and stairways and rows of seats. It was designed for gladiatorial contest, public spectacles and public executions. The monument has 80 entrances and could accomodate 50,000 spectators. (Rome, Italy /2009)