The New York Public Library also has digital archives online. Some of my favorite galleries available here include:

Dust Jackets from American and European books, 1926-1947. When I was kid, books with dust jackets like these could still be pretty easily found, in library stacks or in your grandparent’s house. Some now reside on my bookshelves.

A collection of photos of Broadway theater marquees and facades.

My favorite so far: Turn of the Century Posters. Images of book, magazine and newspaper posters from 1893 through the middle of the last century. I love this one advertising a serialization of Conan Doyle’s Sir Nigel. And wasn’t the Boston Herald classy once upon a time?