
Upon my return I looked for information on the mosaics. Westminster Abbey's site has some information, here, here and here. Plus, I found two books had been written on them. One is in our library and I’ll take it out eventually. I ordered the other Patterns of Thought: The Hidden meaning of the Great Pavement of Westminster Abbey by Richard Foster through Interlibrary Loan.
I’ve just begun reading and realized some of what caught my eye: “Whereas mosaic designs are made up of tesserae all of the same size and same, roughly square, shape, cosmati designs are composed of stones of different sizes cut to particular shapes to fit the pattern, rather like patchwork.” (p.2)
I’ve also already learned what “cosmati” means: it is a name derived from Cosmatus, the paternal name of one of the leading families of these Italian craftsmen. (also p. 2)

I've also learned from reading that there is a Latin inscription on the floor that refers the the end of the world and perhaps describes the cosmos. There is so much cool stuff to learn!