 The French Toniná Project began excavations in 1972 which continued through 1975 , then resumed in 1979 to 1980 , under the direction of Pierre <unk> and Claude <unk> . The National Institute of Anthropology and History of Mexico ( <unk> , the <unk> <unk> de <unk> e Historia ) began their own excavations at Toniná the following year . 
