The Russell Senate Office Building is the oldest of the United States Senate office buildings. Designed in the Beaux-Arts architectural style, it was built from 1903 to 1908 and opened in 1909.

It was named for former Senator Richard Russell Jr. from Georgia in 1972.

The Kennedy Caucus Room of the Russell Senate Office Building is one of the grandest and most historic rooms in the nation’s capital. As its name implies, the Caucus Room was originally intended for party caucuses or meetings where members of the same party decided upon their candidates, policies, and legislative matters. Prior to completion of the Senate Office Building, each party held its caucuses wherever it could find available space, sometimes in the Senate Reception Room and the Senate Chamber.

The Caucus Room, and the office building, built between 1906 and 1909, were designed by John Carrère and Thomas Hastings, prominent New York architects.