Ancient Greece and wine help satisfy demand. Wine historians have theorized that the Greeks may have introduced viticulture to Spain and Portugal, but competing theories suggest that the Phoenicians probably reached those areas first. The grape clusters, vines and wine cups that adorn Greek coins from classical times bear witness to the importance of wine to the ancient Greek economy. With every major trading partner, from the Crimea, Egypt, Scythia, Etruria and beyond, the Greeks traded their knowledge of viticulture and winemaking, as well the fruits of their own production. Millions of amphora pieces bearing the unique seals of various city-states and Aegean islands
Ancient Rome and wine also given impetus by the changing Roman diet. In the 2nd century BC, Romans began to shift from meals consisting of moist porridge and gruel to those more bread-based; wine aided in eating the drier food. Wine played a major role in ancient Roman religion and Roman funerary practices, and was the preferred libation for most deities. The invention of wine was usually credited to Liber and his Greek equivalents, Bacchus (later Romanised) and Dionysus, who promoted the fertility of human and animal semen, and the "soft seed" of the vine. Ordinary, everyday, mixed wines were under the protection of