Invention
The Euphonium was invented in 1843 by a concertmaster named Sommer of Weimar. The Euphonium is part of the Tuba family, and took the place of the Tenor Tuba when it was developed.
Range
The range of the four valved Euphonium is very similar to that of the bass trombone, usually from the low C below the bass clef, to the high Bb above the bass clef.