This one looks nearly intact; while I do really, really like mosaics, they, uh, vary widely in quality. The Romans and the people in the Roman Empire really liked things colorful. Mosaics were also used to communicate more mundane messages in a less colorful style, like this famous entrance vestibule floor:
A glass shield now protects the House of the Tragic Poet, where tourists can see the dog with the inscription "Cave Canem" - Latin for "Beware of the dog". ©EPA
That one looks in excellent condition. I do like the more colorful ones but this one’s a beauty simply because it’s in such great shape.
The fact these artifacts remain intact and maintain their colors after so many years is the fascinating thing and makes seeing these finds so interesting.