The Violoncello is a bowed string musical instrument. It has four strings, which are thicker than those on a Violin or Viola, and are tuned in fifths (Do, Sol, Re, La). It is commonly played with a bow, but fingers may also be used (a technique known as “pizzicato”). The Violoncello first appeared during the 16th century, and was equipped with an endpin in the early 19th century, which rests on the floor to support the violoncello in a playing position, between the musician’s legs. The size of the contemporary Violoncello, with a back length of 75-76 cm and overall height of 125 cm, was instituted by Stradivari. The Violoncello produces a full tone, which makes it a very popular solo instrument with many composers.