Khal Adath Jeshurun (KAJ) is a German-Jewish Ashkenazi congregation in the Washington Heights neighborhood, in the New York City borough of Manhattan. It has established an offshoot in the heavily Jewish neighborhood of Monsey, New York. The community is a direct continuation of the pre-war Jewish community of Frankfurt am Main led by Samson Raphael Hirsch. Khal Adath Jeshurun bases its approach, and structure, on Hirsch's philosophy of Torah im Derech Eretz; it was re-established according to the protocol originally drawn in 1850, which the congregation continues to adhere to fervently.