We noticed that many houses had marble on the floors and not simple pieces but made like carpets or pictures and ornaments.
Here is one of the most believed topics from the entrance of one of the houses of Pompei

«Осторожно,злая собака!» на Яндекс.Фотках
My photos are from Herculaneum. Most of them, except the last here are from the male and female public baths.





This house has this beautiful carpet. Floors in the other houses were made more or less the same way.

Read more about the art in the houses of Romans in these posts:
Pictures On The Walls In Herculaneum/ Ercolano 1
Floors If The Roman Houses 2
Decorate Your House With Bás-Reliefss And Sculpturs 3