The first session of the 39th Congress is sitting in Washington DC from early January to late July, 1866

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The first session of the Thirty-ninth Congress of the United States sat in Washington, DC. with Schuyler Colfax of Indiana in the Speaker's chair. The session lasted until July 28, 1866. (By John Osborne)
Source Citation
Office of the Clerk, U.S. House of Representatives, "House History."  http://clerk.house.gov/art_history/house_history/index.html
    Date Certainty
    Exact
    Type
    Legal/Political
    How to Cite This Page: "The first session of the 39th Congress is sitting in Washington DC from early January to late July, 1866," House Divided: The Civil War Research Engine at Dickinson College, https://hd.housedivided.dickinson.edu/index.php/node/21962.