City Seen is a massive undertaking - a labor of love I've been developing, on and off, for years.
You'll find a lot of information here, and lots more on the way.
A few places to start:
Use the Builders menu to learn about specific architects and builders.
Learn more about seeing, classifying, and describing buildings in our Ways of Looking at Buildings series.
Check out the site map for an overview of the site.
We'll add more pointers soon.