Louis Lewandowski (April 23, 1821 – February 4, 1894) was a German composer of synagogal music.
He contributed greatly to the liturgy of the Synagogue Service. His most famous works were composed during his tenure as musical director at the Neue Synagoge in Berlin and his melodies form a substantial part of synagogue services around the world today.
Lewandowski was born at Wreschen, province of Posen, Prussia (now Września in Poland). At the age of twelve he went to Berlin to study piano and voice, and became solo soprano in the synagogue. Afterward he studied for three years under A. B. Marx and attended the school of composition of the Berlin Academy. There his teachers were Carl Friedrich Rungenhagen and Eduard Grell. Lewandowski was the first Jew to be admitted to the school at the request of Felix Mendelssohn. After graduating with high honors, he was appointed in 1840 choirmaster of the Berlin synagogue. In that capacity he rendered invaluable services in the development of music for synagogue ritual.
In 1866 he received the title of "royal musical director." Shortly afterward, he was appointed choirmaster in the Neue Synagoge, Berlin, for which he composed the entire musical service. The Neue Synagogue was what would then have been called a conservative synagogue and what now would be considered progressive. His arrangements of ancient Hebrew melodies for choir, cantor, and organ are considered masterly productions, characterized by great simplicity and a profound religious sentiment. Many of Lewandowski's pupils became prominent cantors. Lewandowski was the principal founder of the Institute for Aged and Indigent Musicians, an institution that prospered under his management.
Lewandowski died in Berlin in 1894. He and his wife Helene are buried in the Weißensee Cemetery. On their gravestone is inscribed: "Liebe macht das Lied unsterblich!" (Love makes the melody immortal!)
Contribution to Jewish Liturgical Music 
Lewandowski's principal works include: "Kol Rinnah u-Tefillah," for cantor; "Todah ve-Zimrah," for mixed chorus, solo, and organ; 40 psalms, for solo, chorus, and organ; symphonies, overtures, cantatas, and songs. During Lewandowski's life the issue of whether an organ should be part of a synagogue service was one of major contention. Lewandowski advocated communal singing and the organ was essential to facilitate this. Eventually organs became commonplace in synagogues around Europe, hence the popularity of "Todah ve-Zimrah". Lewandowski's writing is quite unique in that it incorporates the strict four-part harmony of church music with ancient cantorial modal melodies.
Lewandowski's Music Today 
Today Lewandowski's music forms a central part of the synagogue service in Reform, Liberal, Conservative and Orthodox communities. It is sung across the world from Europe to Australia and America to South Africa. Most orthodox synagogues across the world no longer allow mixed choir and organ, hence much of this music has been arranged for a capella male choir. Even in communities without choirs one can here the melodies of Lewandowski either chanted by the cantor or a communal unison.
Over the past decades attempts have been made to celebrate the music of Lewandowski. The "Zemel Choir" of London released an album of the works of Lewandowski according to their original settings entitled "Louis Lewandowski - Choral and Cantorial Works". In 2011 in Berlin an annual international choir festival was started under the auspices of the mayor called the "Louis Lewandowski Festival". "The Synagogal Ensemble Berlin", the resident choir at the Pestalozzi Straße Synagogue in Berlin present full Lewandowski Shabbat services every Friday night and Saturday Morning. The "Lewandowski Chorale, Johannesburg" is a non-denominational mixed choir focussing on bringing the music of Lewandowski to a wider audience.
- Mendel, Hermann and August Reissmann, editors. Musikalisches Konversations-Lexikon (12 volumes). Berlin, 1870-1873.
- Champlin, J. D. and W. F. Apthorp, editors. Cyclopedia of Music and Musicians (3 volumes). New York, 1888-90.
- Riemann, Hugo, editor. Musik-Lexikon (5th edition). Leipzig, 1900.
- Jascha Nemttsov/Hermann Simon editors. Louis Lewandowski 'Love makes the melody immortal!' , Berlin 2011, Hentrich&Hentrich Verlag Berlin
- Louis Lewandowski Festival, Berlin 2011
- Sound Examples
- Free scores by Louis Lewandowski in the Choral Public Domain Library (ChoralWiki)
- Free scores by Louis Lewandowski at the International Music Score Library Project