Congregation Baith Israel Anshei Emes is an egalitarian Conservative synagogue located at 236 Kane Street in Cobble Hill, Brooklyn, New York City. It is currently the oldest continuously operating synagogue in Brooklyn.
Founded as Baith Israel in 1856, the congregation constructed the first synagogue on Long Island, and hired Rabbi Aaron Wise for his first rabbinical position in the United States. Early tensions between traditionalists and reformers led to the latter forming Congregation Beth Elohim, a Reform synagogue, in 1861. The synagogue nearly failed in the early 1900s, but the 1905 hiring of Israel Goldfarb as rabbi, the purchase of its current buildings, and the 1908 merger with Talmud Torah Anshei Emes, re-invigorated the congregation.
The famous composer Aaron Copland celebrated his bar mitzvah there in 1913, and long-time Goldman Sachs head Sidney Weinberg was married there in 1920. Membership peaked in the 1920s, but with the onset of the Great Depression declined steadily, and by the 1970s the congregation could no longer afford to heat the sanctuary. Membership has recovered since that low point; the congregation renovated its school/community center in 2004, and in 2008 embarked on a million-dollar capital campaign to renovate the sanctuary.