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Umbilicus (reference point)

In a typical Roman city, an umbilicus (umbilicus urbis, "city navel") represented the reference point used by the city planners to map out the city spaces, including the pomerium, a sacred city boundary. The place for an umbilicus was supposedly set by examining the sky.

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Umbilicus (reference point)

Nodes21
Edges20
Triples0
Avg. degree1.9
Density0.095238
Components1

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city umbilicus roman surveying reference point used ground doi navel pomerium groma retrieved 10 stone boundary gods isbn 2023-09-27 rome

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