Karl August Freyer was a German-Polish organist and composer of church music of the 19th century. Karl August Freyer was not only respected music teacher and virtuoso, but also a prolific composer. He wrote mostly organ music, but also chorales, preludes, variations for piano and even dances. Many of his compositions are still played today. In addition, he also created a handbook of organ music and edited a songbook for the Protestant communities of Poland. His works have been published in Berlin, Leipzig, Warsaw and even New York.