Retsina

Retsina is a Greek white (or rosé) resinated wine, which has been made for at least 2,000 years. Its unique flavor is said to have originated from the practice of sealing wine vessels, particularly amphorae, with Aleppo pine resin in ancient times. Before the invention of impermeable glass bottles, oxygen caused many wines to spoil within the year. Pine resin helped keep air out, while infusing the wine with resin aroma. The Romans began to use barrels in the 3rd century AD, removing any oenological necessity for resin, but the flavor itself was so popular that the style is still widespread today. The earliest recorded mention of using resin with wine amphorae is by the first-century Roman writer Columella, who detailed in his work De Re Rustica (12,20,3 and 12,22,2) the different type of resin that could be used to seal a container or be mixed into the wine. He recommended, however, that the very best wines should not be mixed with resin because of the unpleasant flavor introduced thereby. His contemporary, Pliny the Elder, does recommend the use of adding resin to the fermenting wine must in his work Naturalis Historia (14.124) with the resin from mountainous areas having a better aroma than those that come from lower lands (16.60). The Roman settlements in Illyria, Cisalpine Gaul and Gallia Narbonensis did not use resin-coated amphorae due to the lack of suitable local pine trees and began to develop solid, less leak-prone wooden barrels in the 1st century AD. By the 3rd century, barrel making was prevalent throughout the Roman Empire. The exception was the eastern empire regions of Byzantium which had developed a taste for the strong, pungent wine and continued to produce resinated wine long after the Western Roman Empire stopped. The difference in taste between the two empires took center stage in the work of the historian Liutprand of Cremona and his Relatio de Legatione Constantinopolitana. In 968, Liutprand was sent to Constantinople to arrange a marriage between the daughter of the late Emperor Romanos II and the future Holy Roman Emperor Otto II. According to Liutprand, he was treated very rudely and in an undignified manner by the court of Nikephoros II, being served goat stuffed with onion and served in fish sauce and "undrinkable" wine mixed with resin, pitch and gypsum—very offensive to his Germanic tastes.

Source: Wikipedia