Legislation & Procedure
Nominations & Treaties
Officers & Staff
Political Parties & Leadership
Sessions of Congress
The Directory provides information about former and current senators.
Congressional Sessions lists all Congresses and corresponding years - from 1789, when the 1st Congress met, through the current Congress.
The U.S. Senate Historical Office has published the Guide to Research Collections of Former United States Senators, 1789-1995, which lists where the papers of former senators are located, and provides general descriptions of the content of the collections.