The Keep (University College) Palace Green, Durham (Durham City) - Source of Reference
| No. | Originator(s) | Date | Title | Notes |
|---|---|---|---|---|
| 1 | Department of Environment, English Heritage, Historic Buildings and Monuments Commission | 1950 | List of buildings of special architectural or historic interest, also known as "Greenbacks" | LB Volume, Map & Item: 1914, 14, 357 |
| 2 | The Keep (University College) Palace Green, Durham | |||
| 3 | The Castle Keep, Palace Green, Durham | |||
| 4 | The Keep, Durham - detail | |||
| 5 | Leyland, M | 22-Nov-1994 | The origins and development of Durham Castle to AD 1217: the archaeological and architectural record | |
| 6 | Keep, Durham Castle (County Durham) | |||
| 7 | Keep, Durham Castle (County Durham) | |||
| 8 | Keep, Durham Castle (County Durham) | |||
| 9 | Clack, P A G, Gosling, P F, Northern Archaeological Survey | 1975 | Archaeology in the North Gazetteer 1975 | NZ24SE20 |
| 10 | Unknown | Historic England Aerial Photographs Collection | RAF/CPE/B/UK/10 5013 28-Mar-1948 |