Zarathrustra is a very artistic cat. He belongs to Russian artist Svetlana Petrova, who recreates classic artworks to feature her big, ginger pet.
She tells the BBC: "I lost my mother in 2008 and she left me Zarathustra. I got horrible depression after her death and for two years I was unable to do something creative. By chance a friend asked me 'why don't you make an art project with your cat because he's so funny'."
Svetlana was happy for us to use these images, but she asked for Zarathustra to be credited as co-author. We are happy to oblige.