In the 17th century, the viola da gamba began to be replaced by the viola da braccio, an instrument that was held on the shoulder like the modern viola. The viola da braccio had a similar shape and size to the viola da gamba, but it had a flatter back and a shorter neck. It also had four strings, tuned the same as the viola da gamba. The viola da braccio quickly became the preferred instrument for playing in orchestras, and it eventually replaced the viola da gamba altogether.
The modern viola is a direct descendant of the viola da braccio, and it has changed very little in design over the centuries. It is a beautiful instrument with a rich, mellow sound, and it is an essential member of the modern orchestra.