What, you may ask, is Betonbabe? It’s where béton (German for “concrete”) meets babe, who is Princeton University School of Architecture graduate student Viviane Hülsmeier. Her nifty Tumblr site features a collection of “lost and found” pieces of architecture, urbanism, and design, such as this 1962 photo of “Smoke” at the “Scale as Content” exhibit at D.C.’s Corcoran Gallery of Art. Visiting her site is akin to stumbling upon a flea market staged by design geeks: the only known photos of Harry Bertoia’s sculptured fountain in Calumet, Ill., for instance, have been rescued from an old suitcase and posted for all to see. Bookmark the site. We have. • betonbabe.tumblr.com