Travertin is often used as a building material. Rich deposits of aged, dried and hardened travertine were mined by the Romans. The largest building in the world constructed mostly of travertine is the Colosseum in Rome. Other notable buildings using travertin extensively include the Sacre-Coeur Basilica in Paris and the Getty Center in Los Angeles, California. The travertin used in the Getty Center construction was imported from Tivoli and Guidonia.