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U.S. Capitol Dome was constructed with 8,909,200 pounds of ironwork bolted together in a masterpiece of American will and ingenuity.
The U.S. Capitol’s dome made of cast iron was designed by Thomas U. Walter and...

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The Summerhouse on the Capitol Grounds surrounded by pink azalea flowers.
A few ideas to help you in planning a visit to Capitol Hill.

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Painted portrait of Dr. William Thornton
The Architect of the Capitol (AOC) is the builder and steward of America’s...

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Letterpress Print of a leaf
Learn to turn local invasive weeds into useful materials on October 12 at 1:30...

WHAT WE DO

Stewards of iconic buildings and grounds of Capitol Hill since 1793.

STORIES

Screenshot from the U.S. Capitol rotunda mobile app.
​Knowing that the U.S. Capitol Rotunda would be closed to visitors between July 27 and September 7... More »
Capitol Visitor Center rendering of south entrance.
The Architect of the Capitol (AOC) works to continually improve physical access across the Capitol... More »

EVENTS

"Exposed: The Secret Life of Roots" graphic.
Plant roots are vital components of the earth's ecosystem. They are necessary for plant growth,... More »
"Congress Investigates" exhibit includes items like this Watergate evidence.
Monday through Saturday, 8:30 a.m. to 4:30 p.m. — The Capitol Visitor Center's new exhibit entitled... More »
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