As you may have guessed from the title above, this is an educational post.Anna has four tattoos, but it was this one, on the back of her left calf, that caught my eye as she passed me on Seventh Avenue last week. I stopped to ask what this was all about. And I felt like I was back in the classroom. Absolutely fascinating!This piece is based on the art found on the Chigi Vase:So why is the Chigi