Early Christian & Byzantine architecture is represented in the document through descriptions and images of buildings from the 4th-6th centuries AD. These include the mausoleum of Santa Costanza in Rome, the circular martyrium of San Stefano Rotondo, Constantine's Basilica and other basilica style churches from the time period such as Santa Sabina, St. Peter's Basilica and Santa Maria Maggiore located in Rome.

1. Early Christian & Byzantine

2. SANTA COSTANZA, Rome, c. 350 AD Built as a tomb for Constantine's daughter Constantina (who is now known as Santa Costanza) Santa Constanza, 350CE, Rome

3. Santa Costanza, section and plan

4. View of the Church of Santa Constanza, Rome. Originally built in the mid 4th c. AD as a mausoleum for Constantia, daughter of Constantine. View of circular corridor and ceiling mosaics.

5. Santa Costanza, Interior looking towards tomb, note mosaic decoration of vault and the radial pairing of columns

6. San Stefano Rotondo, Rome (468-83 AD) This circular martyrium was built to house the remains of the first martyr, Stephen

7. BASILICA of Constantine (and Maxentius) 310 CE

8. Basilica of Constantine

9. Reconstruction of the interior of the Basilica of Constantine. In the apse is the colossal statue of Constantine (about 36 feet tall).

10. Constantine's Basilica at Trier, c310 CE Constantine’s Basilica, c.310CE, Trier

11. Constantine's Basilica at Trier

12. Constantine's Basilica at Trier

13. Santa Sabina Rome, c.42 Santa Sabina, c.420CE, Rome

14. Santa Sabina Rome, c.422

15. Basilica of Santa Maria Maggiore, Rome, 432-440

16. (Old) St. Peter's Basilica, the Vatican c.325 (Old) Saint Peter’s Basilica , c.325CE, the Vatican

17. (Old) St. Peter's Basilica

18. Basilica of St Peter, Rome ("Old St Peter's"), c.320CE Note the introduction of a transept

19. Alberti. Mantua. Sant'Andrea begun 1470