Composer Louis Lewandowski was responsible for major reforms in Jewish synagogue music in Berlin in the 19th century. His music became well known across the Jewish world and even extended beyond Jewish circles. Alexander Mendelssohn recommended Lewandowski for admission to the Berlin Academy of Arts, and he became the school's first Jewish student. In 1844, he was hired as the Berlin Old Synagogue's choirmaster, later contributing music of his own to Jewish services. He introduced four-part choral singing to Jewish music, the first to systematically provide music for large segments of Jewish services. Among his most famous works at the time was Hallelujah, Psalm 150, which was performed at the opening of Berlin's New Synagogue in 1866 with Otto von Bismarck in attendance. The Psalm 150 setting was issued in 2015 by the San Diego Jewish Men's Choir.