Top: classification scheme for fragments belonging to Class I for bricks (types: bipedales, sesquipedales, bessales) and Class II for roof-tiles. Bottom: forms of brickstamps (a. rectangular, b. horseshoe, c. orbicular with medium-sized orbiculus).

From The Horace's Villa Project, 1997-2003 by Bernard Frischer, Jane Crawford and Monica De Simone