Not only is this library a monument in itself there's also a great book shop and reading room. 

Walk inside the huge doors and stand in the rotunda and gaze up 3 floors to the gorgeous stained glass dome above. Climb the curved wooden staircase to get a spectacular close up of the art glass. 

Take the kids to the second floor via the stairs to see a fun mural. Elevator is available too. Puppets and books and more available and not cramped at all.

 The lower level has an incredible archives as well as a small theatre. It's really gorgeous and ask if there's a  tour. You won't be sorry!