Mandolins evolved from the lute family in Italy during the seventeenth and eighteenth centuries, and the deep bowled mandolin produced particularly in Naples became a common type in the nineteenth century. The original instrument was the mandore which evolved in the fourteenth century from the lute. As time passed and the instrument spread around Europe, it took on many names and various structural characteristics.
Further back, dating to around 15,000 BC to 8,000 BC, single-stringed instruments have been seen in cave paintings and murals. They were struck, plucked, and eventually bowed. From these, the families of stringed instruments developed. Single strings were long and gave a single melody line. To shorten the scale length, other strings were added with a different tension and pitch so one string took over where another left off. In turn, this led to being able to play dyads and chords. The bowed family became the rabob, and then the rebec fiddle, evolving into the modern violin family by 1520 (incidentally also in Italy). The plucked family led to lute-like instruments in 2000 BC Mesopotamia, and developed into the oud or ud before appearing in Spain, first documented around 711 AD, courtesy of the Moors.
The mandolin is the soprano member of the mandolin family, as the violin is the soprano member of the violin family. Like the violin, its scale length is typically about 330 mm. Modern American mandolins modeled after Gibsons have a longer scale
A mandolin is a musical instrument in the lute family (plucked, or strummed). It is descended from the mandore, a soprano member of the lute family. It has a body with a teardrop-shaped soundboard, or one which is essentially oval in shape, with a soundhole, or soundholes, of varying shapes which are open and are not decorated with an intricately carved grille like the Baroque era mandolins. [1][2]
Originally mandolins had six double courses of gut strings tuned similarly to lutes, and plucked with the fingertips, while the design common today has eight metal strings in four pairs (courses) which are plucked with a plectrum. The latter originated in Naples, Italy during the 3rd quarter of the 18th century.
There were and still are many variants. These include Milanese, Lombard, Brescian and other 6-course types, as well as four-string (one string per course), twelve-string (three strings per course), and sixteen-string (four strings per course).