By Lonely Planet, Averbuck, Alexis, Baker, Mark, Christiani, Kerry, Filou, Emilie, Garwood, Duncan, Ham, Anthony, Richmond, Simon, Schulte-Peevers, Andrea, Wilson, Neil
By Andrew Duncan
By Adkin, Mark
By Taylor, Arnold J., Avent, Richard, Cadw: Welsh Historic Monuments
By Darius, Jon, Griffiths, John, Turvey, Peter
By DK
By Rough Guides
By Sugden, Keith
By Landi, Sheila
By DK Eyewitness
By Smets, Irene
By Cox, .
By Abigail Willis, David Swindells
By Cumming, Valerie, Merriman, Nick, Ross, Catherine, Alerie 7 Others
By Carol Duncan, Duncan, Carol
By Paul Blanchard
By Fodor Travel Publications
By DK Travel
By David Else, etc., Else, David
By Hall, Michael, Wales, H.R.H The Prince Of
By Wilmott, Tony.
By Fodor's Travel Guides
By Roberts, Paul
By treasures of italy
By Fisken, Alec