Long before concrete made its appearance on the building scene in Rome, the Romans utilized a volcanic stone native to Italy called tufa to construct their buildings. Although tufa never went out of use, travertine began to be utilized in the late 2nd century B.C.E. because it was more durable.
I feel like its more appropriate to leave artworks in a museum because if you leave them in their native settings it can possibly be destroyed or stolen. if you leave them in a museum it can be shown by lots of people who loved artwork and will pay billions to get one.