During the Roman Age, named Tibur, it gained a certain importance, also being on the way that Romans had to follow to the mountain regions on the Apennines[?].
It became a residential area and was enriched by Roman villas like Villa Adriana[?] (Hadrian's Villa).
It is the most important center for the production of Travertine, a particular white calcium carbonate rock which most of Roman monuments were made of.
... 1813, by Blaxland, Wentworth and Lawson. Rather than, like earlier explorers, following the river valleys—only to discover that they were terminated by vertical cliffs ...
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