The roots of the plants left holes in the soil, which were filled with plaster of paris, similarly to the way human-shaped effigies were obtained from Pompeii. This allowed the plants to be identified, and the Roman-era gardens reproduced here and there.
House of the Golden Cupids peristylum -- In the early days the ground of the peristylum was used as a kitchen garden. In a second phase these areas became small gardens adding to the beauty of the building, but some of them had trees providing figs, lemons, apples and cherries to the family.
