You have to hand it to the Italians. They are simply spectacular sculptors of marble. This is best showcased in the Cappella Sansevero, a chapel in the historic center of Naples. It is arguably one of the most awe-inspiring spaces on Earth. Everywhere you look you are confronted by sculptures of astonishing beauty, a bevy of masterpieces from 18th century Italian artists that have left visitors scratching their heads in wonder for hundreds of years: how can such intricate works possibly have been carved from single pieces of marble?