The Chassidei Ashkenaz (literally "the Pious of Germany") was a Jewish movement in the 12th and 13th century founded by Rabbi Judah the Pious (Rabbi Yehuda HeChassid) of Regensburg, Germany and several other German Jews, members of the Lehr family and the Kalonymus family. Their philosophy is explained in their prominent Chassidei Ashkenazic works such as Rabbi Judah's Sefer Chassidim and famous liturgal poem An'im Zemirot which is recited every Sabbath in most Ashkenazic synagogues.