What is this background design?

The background for this site is an image of the Cosmati Pavement, a tiled floor under the altar of Westminster Abbey. Supposedly it was "discovered" under some carpet during the preparations for William and Kate's wedding. And if you believe that no one ever bothered to look under the carpet smack in the middle of the most famous church in England for hundreds of years, I've got some prime real estate right here in FL that you might be interested in.

http://www.westminster-abbey.org/our-history/art/cosmati-pavement

The remarkable design contains a wealth of geometry and symbolism, including a numerical riddle that gives the date of the end of the world!

In the year of Christ one thousand two hundred and twelve plus sixty minus four, the third King Henry, the city, Odoricus and the abbot put these porphyry stones together.
If the reader wisely considers all that is laid down, he will find here the end of the primum mobile; a hedge (lives for) three years, add dogs and horses and men, stags and ravens, eagles, enormous whales, the world: each one following triples the years of the one before.

I haven't studied the floor's geometry myself since there is no good image of the whole design available online.

see also: http://quintessentialpublications.com/antichrist2012.html