Perhaps you've heard of the Library of Congress.  Nice Library.

Burton Barr Central Library has a bigger reading room.

Wil Bruder was the Architect.  You either love his work, or you hate his work.  I love his work!  And, this library is as good as it gets.

Arrive in the sixth floor reading room a little before Noon *on* the Summer Solstice.  Ask a librarian:  They'll tell you why. [ah, the mystery....]