> I don't think it's really popular here in the United States

I recently read a longform interview of someone who married into the Pelosi family. Apparently, at least at those levels, a "vanity wall" with pictures of yourself/your family with famous folk (in this case: former presidents, perhaps foreign statesmen) is common.

I tried googling for that phrase... it matches a piece of bathroom furniture, instead of a wall of photos showing off you know famous folk in your expertise.