Period | Order | Probability | Radiocarbon Dates | Date Built | Date of Destruction | Date of Loss |
Prehistoric period uncertain
| A | 100 | | | | |
Early Medieval (400 - 900 AD)
| D | 90 | 542 AD - 655 AD | | | |
Post-Medieval (from 1560 AD)
| E | 100 | | | | |
Bronze Age (2200 BC - 800 BC)
| C | 100 | 2127 BC - 1784 BC | | | |
Neolithic (4000 - 2500 BC)
| B | 100 | 3646 BC - 3382 BC | | | |
Early Medieval (400 - 900 AD)
| D | 100 | 565 AD - 669 AD | | | |
Bronze Age (2200 BC - 800 BC)
| C | 100 | 1127 BC - 903 BC | | | |
Bronze Age (2200 BC - 800 BC)
| C | 100 | 1124 BC - 897 BC | | | |
Bronze Age (2200 BC - 800 BC)
| C | 100 | 1115 BC - 853 BC | | | |
Bronze Age (2200 BC - 800 BC)
| C | 100 | 1013 BC - 829 BC | | | |
Neolithic (4000 - 2500 BC)
| B | 100 | 2833 BC - 2466 BC | | | |