| Site | Type |
| 24 Hour Museum Pages | General |
| Ancient Monuments Society | General |
| Ashmolean Museum, Oxford | Museum |
| British Library | Buildings |
| British Museum | Museums |
| City of London Museums and Galleries | Museums |
| Civic Trust | General |
| College of Arms | General |
| Courtauld Institute Gallery | Galleries |
| Dulwich Picture Gallery | Galleries |
| English Heritage | General |
| Geffrye Museum | Museums |
| Guildhall Art Gallery | Galleries |
| Hayward Gallery | Galleries |
| Historic Houses Association | Buildings |
| Historic Royal Palaces | Buildings |
| Imperial War Museum | Museums |
| Landmark Trust | General |
| Louvre, Paris | Museums |
| Mall Galleries | Galleries |
| Metropolitan Museum of Art NY | Galleries |
| Museum of Costume | Museums |
| Museum of Garden History | Museums |
| Museum of London | Museums |
| Museum of Modern Art NY | Museums |
| NADFAS Main Website | General |
| National Gallery | Galleries |
| National Maritime Museum | Museums |
| National Portrait Gallery | Galleries |
| National Trust | General |
| Natural History Museum Prado, Madrid | Museums |
| Royal Academy | Galleries |
| Royal Residences | Buildings |
| Science Museum | Museums |
| Serpentine Gallery London | Galleries |
| Sir John Soanes Museum | Museums |
| Society for the Protection of Ancient Buildings | General |
| St Pauls Cathedral | Cathedrals |
| Tate Britain | Galleries |
| Tate Modern | Galleries |
| Tower of London | Buildings |
| UK Database of Historic Parks and Gardens | General |
| Victoria and Albert Museum | Museums |
| Wallace Collection | Museums |
| Westminster Abbey | Cathedrals |
| Westminster Cathedral | Cathedrals |