There is a spectacular work of art in the entranceway to the papal apartments in the Cortile del Belvedere in the Vatican.
Two metres high, it is an orange life vest encased in a transparent resin that forms the centrepiece of a crucifix.
It brings immediately to mind the plight of the world's refugees.
The crucifix stops you.
It questions you with its outstretched arms.
It pauses you on the high seas of faith.