| Identify this structure | Constantine's Basilica, Trier, Germany, ca 300 CE, stern facade |
| Identify this structure | Basilica of Maxentius, Rome, begun by Maxentius in 306 and completed by Constantine |
| Identify this structure | The Arch of Constantine, Rome, 315 CE, constructed with various spolia from other monuments |
| Identify this structure | St. John's in the Lateran, Rome, 315 CE, dominated Maxentius's former garrison |
| Identify this structure | Old St. Peter's, Rome, begun in 326 CE, funeral basilica for Peter the first Pope, featured spolia |
| Identify this structure | Basilica of Santa Sabina on the Aventine Hill, Rome, Mid 5th century CE, arches over Corinthian columns |
| Identify this structure | The Mausoleum of Santa Costanza, Rome, 340 CE, mosaic-covered rotunda |
