Abel, the sacrifice of Elias on Mount Carmel, possibly Lot receiving the angels, Moses striking the rock for water, and possibly even Noah building the ark. The upper row of mosaics, largely missing by the 16th century, is thought to have had scenes from the New Testament since it has the Miracle of the Centurion. These mosaics have caryatids and acanthus-scrolls and a calendar of saints in the upper row. This, in conjunction with the two apses is where the majority of Christian imagery occurs. Sarcophagi Two large porphyry sarcophagi from the church are now in the Vatican; the larger and more famous (illustrated) in the Vatican Museums, where it was moved during the late 18th century and is on display. The smaller was moved in St Peter's itself (left transept) in 1606. It is now thought that the larger sarcophagus traditionally related to Constantina may in fact have housed her sister Helena, and the less spectacular one, also removed to the Vatican, was actually Constantina's. Constantina's sarcophagus has complex symbolic designs in relief: "the surface is dominated by an intricate pattern of stylized vine-stems into which are fitted cherubs...with this scene of Dionysiac exuberance, and the hope of future blessedness which it implies, two peacocks, birds of immortality, are completely in accord". The scene presents an image of nature and plenty complete with grape vines, sheep and birds. The putti are framed in acanthus scrolls, above which there are several images of masks. Aside from the natural scene, there are also four portraits including Constantia herself, "on the lid, four graceful portrait heads, one apparently that of Constantina, look calmly out over this assurance that the best is yet to be". The imagery presented of wine and nature are not inherently Christian but could be perceived as such considering the use of wine in the Eucharist. Or they could be perceived as a connection to Bacchus, the God of Wine. This style of sarcophagus would cease to be used in Rome by the end of the fourth century, and this sarcophagus of Constantia is a prime example of the style. The sarcophagus is massive with the chest measuring 128 cm or 4 ft 2 in high, 233 cm or 7 ft 7 in long, and 157 cm or 5 ft 1 in wide. It is made of porphyry, a hard purple stone, reserved by the Romans for use only