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obeliscus vaticanus, obeliscus lateranensis, obeliscus flaminius
https://en.wikipedia.org/wiki/Piazza_della_Minerva
https://it.wikipedia.org/wiki/Obelisco_Vaticano
https://en.wikipedia.org/wiki/Lateran_Obelisk
https://en.wikipedia.org/wiki/Flaminio_Obelisk
https://en.wikipedia.org/wiki/Pliny_the_Elder
https://archive.org/stream/gri_33125008656585/gri_33125008656585_djvu.txt
https://en.wikipedia.org/wiki/Nile