41st United States Congress
The 41st United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1869, to March 4, 1871, during the first two years of Ulysses S. Grant's presidency.
Source: Wikipedia — 41st United States Congress (CC BY-SA 4.0)