Iron and aluminum mobile by Alexander Calder, 1958. The metal structure and movement makes light dance on the walls. Photographed on a sunny day in Rome, January 2017.
La Galleria Nazionale is one of my favorite spaces in Rome. This is the entrance hall and you can see the Calder mobile through the door at the distance. Image credit Fernando Guerra.

Move me

“If you can imagine a thing, conjure it up in space then you can make it... The universe is real but you can’t see it. You have to imagine it. Then you can be realistic about reproducing it.”

– Alexander Calder