exchange for half ("mezza") of the yearly crop. Many landowners in the Chianti region would turn their half of the grape harvest into wine that would be sold to merchants in Florence. The earliest reference of Florentine wine retailers dates to 1079 with a guild for wine merchants being created in 1282. Unlike France or Spain, Italy did not have a robust export market for its wines during the Middle Ages. Its closest trading partners, France and Austria, were separated from Italy by the massive Alps Mountains and also had ample supply of their own local wines. The English had little interest in Italian wines at this point, finding plenty of sources in France, Spain and later Portugal to quench their thirst. While the sweet Lacryma Christi from Campania had some presence on the international market, most Italian wines had to compete for taste of the local market. Even then this market was mostly limited to the aristocracy (who seemed to preferred strong wines made from Vernaccia or sweet Aleatico and Vin Santos) since outside of the major cities of Rome and Naples, there was not yet a strong middle class. During the Renaissance, the city of Florence experienced a period of growth that brought with it an emerging middle class of guilded craftsman and merchants. Some of these Florentine wine merchants, such as the Antinoris and Frescobaldis, would becoming powerful and influential figures in not only the history of Chianti but also of Italian wine. The earliest example of Chianti was as a pale, light white wine being sold by the merchant Francesco di Marco Datini in 1398. It eventually evolved into a coarse, deep color red wine that Sir Edward Barry described as having "disagreeable roughness and other qualities, seldom drunk." Some of these "other qualities" may have been a slight fizziness that was a by product of wine making techniques that emerged during the late Middle Ages. At the time various wine faults would plague unstable Chiantis because they were not able to fully complete fermentation and yeast cells would remain active in the wine. The lack of full fermentation was partly due to cooler temperatures following harvest that stuns the yeast and prohibits activity but could have also been caused by unsanitary fermentation vessels. In the 14th century, Chianti winemakers developed a technique known as governo where half-dried grapes are added to the must to stimulate