Inside we got to see the Crypt, the Rotunda and the Hall of Statues. The Crypt was originally built for George Washington’s body, but is empty because he wanted to be buried at Mount Vernon next to his wife Martha.
The Rotunda is located under the dome. The current dome is the second dome that the building has had. As the country grew and more states were added (thus more representatives to Congress) additions were made to the Capital Building. In the 1850s, a new dome was commissioned because the old dome was too small for the expanded building. The first picture below shows the inside of the dome. The fresco at the top is called the Apotheosis of Washington and was painted by Constantino Brumidi. The next three pictures are from the Rotunda itself. It is quite beautiful.
The next to the last picture shows the Hall of Statues. Each state is allowed to have two statues in the building and many of them are grouped in this room. The last picture is the dome at night which is always a beautiful sight.