Have you checked out Cezar Del Valle's postcard collection on Flickr?
Cezar is based in Brooklyn and is the author of "The Brooklyn Theatre Index" but his sights are turning westward. His Theatre Posts collection on Flickr has nice views of the United Artists, the State and many more.
The view here is a wonderful card showing the Liberty Theatre, 266 S. Main St. See his full size view.
I'd seen smaller versions of the card but nothing this luminous. Thanks, Cezar. We'll be adding links to some of his other cards to the downtown theatre pages over the next few days.
More on the Liberty (and almost 50 other theatres) is on the Main Street Theatres page.