Travertino

Travertino is a library describing constants and a base box model that can be used to define layout algorithms.

It is used as a foundation for the Pack box model in Toga, and for Colosseum.

So, why is it called "Travertino"?

Travertine (Travertino in Italian) is a type of limestone that has been used as a building material for thousands of years. The name derives from the Latin tiburtinus, meaning "of Tibur" - Tibur being a town near Rome that was the historical source of Travertine.

Travertine is the building material that was used to build the Colosseum.