If you go to Chedworth Roman villa and look on the floor in one of their learning rooms you will see they have a linoleum floor mat which has an image of one of the mosaic floors. A good idea for somewhere like that as the image is very clear and first you think they do have a mosaic there. This is the company that makes them, the four image in the top bar slideshow shows the Chedworth one. http://www.eyemats.co.uk/index.html