Parliamentary Procedure

Two Co-Speakers stand at the rostrum of the Oregon House of Representatives during the 2011 legislative session.
Speaker Newt Gingrich presides over the U.S. House of Representatives in 1995 during a session on rules reform.
A wide shot of the U.S. Senate chamber during the 1964 debate on the Civil Rights Act.
A black-and-white photograph of the U.S. House of Representatives chamber during a high-stakes vote in 1961.
A wide shot of the Georgia State Senate chamber in 2002 showing legislators at their desks during a session.