Alinari Corporate Site
http://www.alinari.com/home.htm
Featuring the work of the Fratelli Alinari, this web site is the world's most complete image archive with 3.5 million entries.

American Museum of Photography
http://www.photographymuseum.com
A suberb all-around site dedicated to photography.

Ancient Monuments Society
http://www.ancientmonumentssociety.org.uk/
A site for those interested in the historic conservation of countless building types in the United Kingdom.

Andrew Dickson White Collection, Cornell University, New York
http://rmc.library.cornell.edu/adw/adwhistory.htm
A finding aid of the collection supported by text. Artists include the Fratelli Alinari, the Bisson Freres, Edouard-Denis-Baldus, Giacomi Brogi, Wilhelm Hammerschmidt; the Neurdein Freres, Giorgio Sommer, and many others.

California Museum of Photography, University of California Riverside
http://www.cmp.ucr.edu/
A superb all-around site dedicated to photography.

City Gallery
http://www.city-gallery.com/learning/
The history of popular and family photography.

Currier-McCombs Photographs Division of the William L. Clements Library, University of Michigan at Ann Arbor
http://www.clements.umich.edu/photographs.php
The history of photography.

Davidson Art Center, Wesleyan University, Middleton, Connecticut
http://www.wesleyan.edu/dac/coll/surv/phot/travel.html
A thorough listing of collection guides that highlight Victorian-era travel. Images from Antonio Beato, the Bisson Freres, Felix Bonfils, Francis Frith, Carlo Ponti, Giorgio Sommer, James Valentine, George Washington Wilson, and countless others.

Francis Frith Collection
http://www.francisfrith.com
A 56,000 image archive from the famous publisher.

George Eastman House
http://www.eastman.org
A superb history of photography.

The Georgian Group
http://www.heritage.co.uk/georgian/
A site dedicated to the preservation of Georgian buildings.

International Directory of Photography Historians
http://people.rit.edu/andpph/hpg.html
A thorough list of photography historians.

Rick Steves' Europe Through the Back Door
http://www.ricksteves.com
A thorough and informative site for those interested in traveling to places less traveled.

Royal Photographic Society
http://www.rps.org
The history of photography.

Societe francaise de photographie
http://www.sfp.photographie.com/
A splendid site recalling the early history of French photography.

The Society of Architectural Historians
http://www.sah.org/
The premier site for subjects architectural.

Society for the Protection of Ancient Buildings
http://www.spab.org.uk/
A site for those interested in the historic conservation of countless building types in the United Kingdom.

The Society of Architectural Historians of Great Britain
http://www.sahgb.org.uk/
A superb site for various architectural subjects and projects in the United Kingdom.

United Nations Educational, Scientific, and Cultural Organization
http://www.unesco.org
A site dedicated to preserving the world's top architectural treasures.

The Victorian Society
http://www.victorian-society.org.uk/
A site dedicated to the preservation of Victorian and Edwardian edifices.

World Monuments Fund
http://www.worldmonuments.org
A site dedicated to preserving the world's top architectural treasures.