Judy Garland's Ruby Slippers from the 1939 Wizard of Oz (fun fact: they were originally meant to be silver!):

Jacqueline Kennedy's Inaugural Gown:

Congressional Medals of Honor:

An original Charlie Brown comic strip (the upper is a pencil drawn sketch and the lower is the final pen drawn comic):

Singer sewing machine from 1917:

Michelle Obama's Inaugural Gown:

Mary Lincoln's Inaugural Gown:

Another Dress from Mary Lincoln:

Lincoln's top hat from the day he was assassinated at Ford's Theatre:

Jim Hensen's (a UMD grad) Kermit the from from 1955:

The Fonz's Jacket:

The original Washington Monument:

Old Glory, the flag that inspired our National Anthem (this was an especially dark room due to the rapid deterioration of the fabric of the flag):

Everyone should make at least one trip to our nation's capitol in their lifetime and I highly recommend checking out some of the museums of the Smithsonian!