Travertine pavers have been used for centuries as a construction material for buildings.  Travertine pavers were so popular in Roman times because of how close they were to the original quarries.  It was not unusual for the quarries to be located about 30-60 miles from where the city was being built.  This allowed for easy access to the
travertine pavers and was a natural selection.  The Roman coliseum was built partially because of its close proximity to the travertine pavers.  The Romans of that time probably had little idea that years later, people would travel all over the World to see how their travertine structures last longer than their government structure.  The
Roman Coliseum is still the largest building ever constructed with primarily travertine stone pavers.  Some peole make the mistake of calling the travertine pavers "travertine marble" or even "travertine limestone."  The Roman Coliseum is not made out of "travertine marble" or "travertine limestone."  Travertine is a sedimentary rock.  Travertine comes out of the limestone family but it has other minerals that are in the stone that limestone does not carry.  So travertine and limestone are two distict materials.  Marble, on the other hand, is formed as a metamorphosed stone.  Marble spends significant time in the ground at very high temperature and pressure.  So it is incorrect to use the phrase "marble travertine."