B'nai B'rith International is a prominent global Jewish service organization founded in 1843 by twelve recent German Jewish immigrants in New York City at Aaron Sinsheimer's café on the Lower East Side, led by Henry Jones. Initially established as a cultural and mutual aid association for German Jewish immigrants, it has evolved into a global entity committed to community service, advocacy, combating antisemitism and other forms of bigotry, the security and continuity of the Jewish people, and support for the State of Israel. The organization quickly expanded, establishing lodges across the United States and internationally, with key early milestones including the opening of the Maimonides Library in 1852 (the first Jewish public library in the U.S.) and support for Jewish soldiers during the Civil War in the 1860s. Throughout its history, B'nai B'rith has focused on education, humanitarian efforts (such as disaster relief and senior housing programs), and fighting discrimination. It established BBYO (B'nai B'rith Youth Organization) in the 1920s for young men and in 1944 for young women, fostering Jewish youth leadership. Internationally, it has regional divisions, including B'nai B'rith Israel founded in 1888, which has been active in Israel since the late 19th century. The organization maintains a presence in numerous countries with members, donors, and supporters worldwide, operating through lodges and committees dedicated to policy advocacy, particularly on issues affecting Jewish communities. As one of the oldest Jewish service organizations, B'nai B'rith has influenced Jewish communal life by promoting ethical values, interfaith dialogue, and civil rights. It has been headquartered in Washington, D.C., since the mid-20th century, allowing effective engagement in U.S. policy discussions. The organization's efforts extend to legal advocacy against hate crimes and support for Israel, while also addressing broader social justice issues. With a legacy spanning over 180 years, B'nai B'rith continues to adapt to contemporary challenges, including rising antisemitism and global Jewish concerns.