Thank you all for the comments, really significant and constructive. Allow me a few notes on the Carnival of Venice. Its typical features are just the costumes, so much so that the wearer is standing or walking slowly because it must not take any action: what you should see is the costume. There are some real masks that give expression to the face but are a small part.
For example another typical features of the Carnival of Viareggio, are wagons, monumental buildings with public figures depicted satirically.
I post other three photographs of the Venetian carnival as a demonstration of what I wrote.
Ps. Sorry for my English