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The Cannon House Office Building, completed in 1908, is the oldest...
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Beginning February 25, 2013 construction work will occur in the U.S. Botanic...


This event has already occurred — The history of Congress comes to life off the walls of Exhibition Hall through this guided program for visitors of all ages. Discover how and why the Capitol grew over time, unpack the details of a law and make a legislative decision. Meet at the entrance to Exhibition Hall on the lower level. No reservations or passes required.