The Capitol Building is a magnificent structure with a massive white cast-iron dome topped by the Statue of Liberty. It houses the offices of the U.S. legislature (Senate and House of Representatives), and many laws that have influenced the United States and the world were enacted here. Visiting the interior requires advance booking through the official website. We found the visitor center; security was very strict, and liquids were prohibited, so we had to discard all the hot water in our thermos flasks. Inside, we first watched a 10-minute historical documentary in a small theater, then were divided into groups and given headphones for guided tours. The interior was filled with ornate paintings, exquisite reliefs, and numerous statues of historical figures. The guides enthusiastically explained the furnishings and stories of the historical figures, and we also toured the Senate and House meeting rooms and members' offices.