In this building sat the first Senate and the first House of Representatives of the United States of America. Herein George Washington was inaugurated President March 4, 1793 and closed his official career when herein, also John Adams was inaugurated the second President of the United States March 4, 1797.

See also...
Photo of John Adams, Abigail Adams, and Abigail Adams bronze plaque
Spudgun67 on Wikimedia Commons
Photo of John Adams white plaque
Jez Nicholson on Flickr
Photo of Benjamin Franklin, John Jay, David Hartley, and John Adams marble plaque
Monceau on Flickr
Photo of Thomas Jefferson and John Adams bronze plaque
Elliott Brown on Flickr
Photo of George Washington blue plaque
Canadian2006 on Wikimedia Commons