Triumphal Arch:
- Arch of Titus, Rome
- Arc de Triomphe, Paris
- Washington Square Arch, New York
Triple Arch:
- Arch of Constantine, Rome
- Arc du Carrousel, Paris
- Marble Arch, London
Septuple Arch:
- ???
Cantor’s Arch:
It seems to me that no arch is more triumphant than one that rests on a set of measure zero.
Owen Biesel 
Wonderful! I will keep an eye out for examples of the bottom two.
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Let me know if you find any!
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Though marvelous to look at I wonder if it is sturdy enough. I don’t think it has…. Proper support.
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I doubt it’s stable under pushing forward either…
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