Early reference to the tradition of putting a screen wall at the gate is found in the Analects, 3:22: therein, it is mentioned as a trivial ritual norm ("The princes of States have a screen intercepting the view at their gates". 邦君樹塞門, trans. by James Legge).
The Vatican contains every type of art imaginable. On the floors of the ‘Round Room’ are Roman mosaics from bath houses like the one below from the Baths of Otricoli. It is a huge mosaic and you walk around the edges (feels wrong to walk on any part of it).
As you walk, you are bombarded by beauty. Look to the side and you see priceless works of art. Look above you and you see either jaw dropping architecture or a stunning roof.
Down one hall are a host of baby sculptures, a way for parents to remember children who passed on too early in life.
Why these parents wanted their son remembered wrestling a goose is beyond me, there must be a story there.