The classical guitar (also known as the classic guitar, 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 modern acoustic and electric guitars, both of which use metal strings. 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.