The Guidonian Hand, a mnemonic device to aid the learning of sight singing; a precursor of Tonic Sol-fa. Devised by the Guido of Arezzo (991/992-after 1033), Benedictine monk.

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Keywords: /, 11th, aid, arezzo, benedictine, century, device, devised, eleventh, guido, guidonian, hand, learning, medieval, mnemonic, monk., music, musician, precursor, sight, singing, sol-fa., tonic, vocal