Roman Travertine, also called Barco, has been used since the I millennium b.c. It is a calcareous sedimentary rock; it is a sturdy and workable stone, and can be used for floors or interior and exterior covering and, in certain cases, also for sculpture. 

This material plays the main role in our noble history and keep beautify houses, monument and squares, such as Colosseo and the San Pietro square colonnade.