Beethoven's Triple Concerto for piano, violin, and violoncello, opus 56, is one of Beethoven's most neglected pieces, and is performed far less than any of his other works of similar scope. It has been disparaged by scholars, critics, and performers, and it is in need of a re-evaluation. This paper will begin that re-evaluation. It will show the historical origins of the piece, investigate the criticism, and provide a defense. The bulk of the paper will focus on a descriptive analysis of the first movement, objectively demonstrating its quality. It will also discuss some matters of interpretive choice in performance. This thesis will show that, contrary to prevailing views, the Triple Concerto is a unique and significant masterpiece in Beethoven's output.