Shadow Governments

http://books.google.com/books?id=ehgDAAAAYAAJ&printsec=frontcover&source=gbs_slider_thumb#v=onepage&q&f=false

In 1907 an anonymous turner produced a vase that threw a shadow of Queen Victoria.

Seventy years later, for the Silver Jubilee in 1977, a vase was produced that evoked the profiles of both Prince Philip and Elizabeth II.

Is this a tradition? It might lead us to see too much.