Size comparison

compared to

Pentagon is about 5 times bigger than Colosseum.

Colosseum is approximately 0.019 km² (0.0075 sq mi), while Pentagon is approximately 0.096 km² (0.037 sq mi), making Pentagon 396% larger than Colosseum.
Tip: This to-scale comparison of Colosseum vs. Pentagon uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Pentagon vs. Colosseum

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See Pentagon on top of Colosseum
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