The contrabass trombone (German: Kontrabaßposaune, Italian: trombone contrabbasso) is the lowest instrument in the trombone family of brass instruments. First appearing built in 18′ B♭ an octave below the tenor trombone, since the late 20th century it has largely been supplanted by a less cumbersome bass-contrabass instrument pitched in 12′ F, a perfect fourth below the tenor and bass trombone. Wagner notably specified the contrabass for his Der Ring des Nibelungen opera cycle in the 1870s, and it has since appeared occasionally in large orchestral works without becoming a permanent member of the modern orchestra. In the 21st century it has enjoyed something of a revival, particularly in film and video game soundtracks.