Our SAS library tour continues. So far, we've enjoyed some terrific libraries and we've had a couple of disappointments. I could not schedule a tour for either the National Library of Russia in Saint Petersburg or the Royal Library in Copenhagen, aka The Black Diamond. The librarians at each institution proved to be - dare I say it? - less than helpful. So, sadly, I missed out on my secret-librarian-handshake-required, behind-the-scenes tour of each. We snapped these photos of The Black Diamond as we walked around on our regular, non-password-protected, self-guided tour.