Center of the World

A small city with a magnificent library at it's center. It is rather secluded, and it's existence is something of an open secret. It doesn't appear on any maps, but word of mouth spreads tales of it far and wide. The library is said to contain all the knowledge in the world, that is hyperbole, of course. However, the head librarian does seem to be aiming for a public archive of all the world's knowledge.