The Design of the Colosseum was constructed according to specific plans and dimensions. The Colosseum is an entirely free-standing structure, oval in shape, 615 ft long, 510 ft wide, 187 ft high and had a base area of 6 acres. These are detailed in Dimensions of the Colosseum. It was a symbol of the power of Rome and its emperors. Its classical design features which were reminiscent of classical Greek architecture was meant to convey that Rome was also a great and civilised nation.