On my trip to Paris last month I saw this fine example of stenciled street art.
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I think that the artist used three separate stencils to create the artwork.

Look carefully at the spray can – it even has a mist of red on it.

The artist even signed it. I think it was a self portrait.

Here is one other stencil I liked:

Want to see more Paris street art? You might like this post and this post.