View of the detail of the marble floor of the Office, where the head of the house conducted business and received his "clients" (= tablinum). Note the three–dimensional pattern of the marble floor that is surrounded by a simple black and white mosaic.
The design of the floor is called opus scutulatum that consists of black and white lozenge–shaped marble tiles giving the illusion of receding cubes. Compare the floor of an elite house on Malta. Marble floors were actually more expensive than mosaic floors.