The classical guitar (also known as the nylon-string guitar or Spanish guitar) is a member of the guitar family used in classical music. An acoustic wooden string instrument with strings made of gut or nylon, it is a precursor of the acoustic and electric guitars which use metal strings. The name guitar comes from Persian language, in which Tar means string. Tar (string instrument) is also the name of an Iranian instrument that could be the primary form of guitar. Classical guitars are derived from the Spanish vihuela and gittern in the fifteenth and sixteenth century, which later evolved into the seventeenth and eighteenth century Baroque guitar and later the modern classical guitar in the mid nineteenth century.