Size comparison

compared to

Colosseum is about 5 times smaller than Pentagon.

Pentagon is approximately 0.096 km² (0.037 sq mi), while Colosseum is approximately 0.019 km² (0.0075 sq mi), making Colosseum 20.15% the size of Pentagon.
Tip: This to-scale comparison of Pentagon vs. Colosseum uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Colosseum vs. Pentagon

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See Colosseum on top of Pentagon
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