such as "the two Aurelii Heraclae, father and son", "the Fadii", "Cutius Celsianus and Fabius Galaticus", "the two Junii, Melissus and Melissa", "the partners Hyacinthus, Isidore and Pollio", "L. Marius Phoebus and the Vibii, Viator and Retitutus." This suggests that many of those involved were members of joint enterprises, perhaps small workshops involving business partners, father-son teams and skilled freedmen. Later history Monte Testaccio's use as an amphora dump seems to have ceased after about the 260s, perhaps due to the city's quays being moved elsewhere. A new type of amphora was also introduced around this time to transport olive oil. A need to dispose of these bulky containers remained. Nine buildings in the Rome area constructed in the fourth century have been found to use amphorae as space filler/lightener elements in their concrete portions. One example is the Circus of Maxentius, which was constructed between 308 and 312 at the third mile of the Via Appia: it is estimated that at least 6,000 and more likely as many as 10,000 amphorae were used in this facility. As Peña notes, directing these vessels "toward state-sponsored construction projects for use as space-fillers in concrete vaulting, the praefectura annonae could have succeeded in disposing of substantial numbers of highly cumbersome and otherwise useless oil containers, while at the same time reducing the amount of lime, sand and rubble that would have been required to complete these initiatives." The area around the hill was largely abandoned after the fall of Rome. A print of 1625 depicts Monte Testaccio standing in isolation in an area of wasteland within the ancient city walls, and even as late as the mid-19th century the surrounding area was little more than a "romantic desert" with only "a few shabby houses". It was the scene of jousts and tournaments during the Middle Ages, when Monte Testaccio was the scene of pre-Lenten celebrations. As part of the festivities, two carts filled with pigs were hauled to the top of the hill, then released to run back down and smash in pieces at the bottom of the hill, where the watching revellers then dismembered the pigs on the spot for roasting. Monte Testaccio was still used as a place of recreation when Stendhal visited in 1827. A 19th-century traveller, visiting a few years earlier, described the annual festival that was held on the summit of the hill: Each Sunday and Thursday