The history of beer in Portugal is already quite long. Many tribes that passed here produced drinks that we might consider to be distant relatives of beers. Recent archaeological studies show that the Lusitanians, pre-Roman
peoples who inhabited the Iberian Peninsula, lived essentially from a
rudimentary agriculture, grazing and collecting products that nature
As Strabo reported, they fed on goat's meat and made bread of the fir tree (the fruit of the cork oak) and not of grain; They used butter instead of olive oil, they drank water and a kind of barley beer, for wine was only used in feasts.
And so it was defined by a clergyman in Coimbra in the eighteenth century: "A drink that is used in the northern parts, which is made of barley, or wheat, and another thing mixed with cock-toed grass (hops)." Of Beer, to which the ancients and particularly Columella, called with the Greek name, Zythum, (...) In the 1st Vol. Of the Lusitanian Monarchia (...) his author says that when Lysias entered the ancient Lusitania, he taught to do Beer of barley, with which the guests were celebrated in the old days and if they drank in their invitations and in this way of liquor they will use the old Portuguese long time, because still in Strabo ... there was very little wine in Lusitania. "