Added 3 images from 1944 to the Trombone History Timeline (20th century). Three photographs, which show soprano, alto, and tenor trombones, document a Moravian trombone choir performance in Bethlehem, Pennsylvania. Taken by Howard R. Hollem, they bear the title “The Moravian trombone choir which plays chorales before the opening of each performance of the Bach choir,” and belong to the American Memory collection of the Library of Congress. Numerous other timeline entries, dating back to the 18th century, detail the extensive Moravian trombone choir tradition in trombone history.