The violin is a bowed string instrument with four strings tuned in perfect fifths. It is the smallest and highest-pitched member of the violin family of string instruments, which also includes the viola and cello.
Mongolian horsemen from Inner Asia were probably the world’s earliest violinists. Their two-stringed upright fiddles were strung with horsehair strings, played with horsehair bows, and often feature a carved horse’s head at the end of the neck.
A distinctive feature of a violin body is its "hourglass" shape and the arching of its top and back. The hourglass shape comprises two upper bouts, two lower bouts, and two concave C-bouts at the "waist," providing clearance for the bow.