Percussion instrument
In an orchestra there can be more different kind of percussion instruments than in the other families: string, woodwind and brass instruments.  However, older music does not often use lots of percussion. Most music for orchestra by composers like Mozart and Beethoven only use the timpani. In the 19th century, more percussion is added: cymbals, tambourine, triangle etc. In the 20th century, some composers may use very many percussion instruments.