Sponsored by the Chicago Historical Society, the site was developed by CHS and Northwestern University, assisted by associations ranging from the Illinois State Police Forensic Sciences Command to the Chicago Institute of Music Chorale. All links work, and I expect the site to remain on the web for the foreseeable future. There are even promises that additional material will be added, such as a curriculum guide. A search feature or an index would form an extremely valuable addition to this large and complex site, as objects, people, and events reappear throughout. On the other hand, it does provide links to all necessary plug-ins.
Navigation is complicated.
Attractive navigation bars located at the top and bottom of most pages link to the other subsections of the particular section you are currently in, as well as to the table of contents. However, the table of contents is the only place where you can access all of the site's major sections, and each section's subsections are accessible only after you have entered that particular section. Important bits of information are repeated for the benefit of the users who prefer to wander through sites. However, most of the subsections contain linear narratives, which need to be followed from beginning to end for maximum impact. Readability is for the most part excellent.