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3-D images | |
| ca. 380 AD | The first cathedral |
| 5th century | A baptistery and two cathedrals |
| 6th century | Extension of the north cathedral |
perspectives | |
| 9th-11th century | The north cathedral |
photos | |
| 4th-6th century | Threshold of the north cathedral |
| 4th-6th century | Stratigraphical cross-section of the floor of the north cathedral |
| 4th-6th century | Model of the north cathedral |
| 4th-6th century | Model of the north cathedral - detail |
| 2006 | Model of the north cathedral |
| 2006 | Model of the north cathedral - detail |