The Testaceus Mount in a closer view. On the slopes of the Testaceus, some constructions were finally built with the passing time, among which the tomb of Rusticelii (Sepulcrum Rusticeliorum) clung to the slope in the centre of the mound. It was a 30 square feet round monument made of peperino (volcanic tuff used in Roman construction) built about the end of the Republic. It was only in 1687, during excavations, that the spot of the tomb was found again. If we go further up the climbing way along the hill, we reach, completely at the bottom of the picture, with its unobstructed view of the river, the House of Volusius Saturninus, suffect consul in 3 AD (additional consul nominated by two at a time).