Classical guitar may vary, but the typical shape is either "modern classical guitar" or that "historic classical guitar" similar to the early romantic guitars of France and Italy. Classical guitar strings once made of gut are now made of such polymers as nylon, with fine wire wound about the acoustically lower (bass side) strings. A guitar family tree may be identified. The flamenco guitar derives from the modern classical, but has differences in material, construction and sound. Today's "modern classical guitar" was established by the late designs of the 19th-century Spanish luthier, Antonio Torres Jurado. The classical guitar has a long history
Ten-string classical guitar of Yepes Ten-string classical guitar of Yepes The ten string extended-range classical guitar, with fully chromatic, sympathetic string resonance was conceived in 1963 by Narciso Yepes, who "ordered the guitar from José Ramírez [III]". This instrument is sometimes referred to as the "modern" 10-string guitar (or the "Yepes guitar") to differentiate it from ten-stringed harp guitars of the 19th century. Today, ten-string instruments to Ramírez' original design remain available from the Ramírez Company, and similar instruments in a variety of designs are available both from the Ramírez Company and other luthiers, notably from Paulino Bernabe Senior. In the early 1960s, luthier José