Ampelography (ἄμπελος, "vine" + γράφος, 'writing') is the field of botany concerned with the identification and classification of grapevines, Vitis spp. Traditionally this has been done by comparing the shape and colour of the vine leaves and grape berries; more recently the study of vines has been revolutionised by DNA fingerprinting.
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Then Pierre Galet of the École nationale supérieure agronomique de Montpellier made a systematic assembly of criteria for the identification of vines.
The wine enters officially in the roll of Piedmontese wines in 1798, the date of the first Ampelography made by Giuseppe Nuvolone-Pergamo, count of Scandaluzza from the Società Agraria di Torino (Agricultural Society of Turin).