and the Guelphs (supporters of the Papacy). Factions from each side controlled the town at various times in the late medieval period.
Once Siena had been conquered by Florence under the rule of the Medici family in 1555, Montalcino held out for almost four years, but ultimately fell to the Florentines, under whose control it remained until the Grand Duchy of Tuscany was amalgamated into a united Italy in 1861.
In the case of Montalcino, gradual economic decline has recently been reversed by economic growth due to the increasing popularity of the town's famous wine Brunello di Montalcino, made from the sangiovese grosso grapes grown within the comune. The number of producers of the wine has grown from only 11 in the 1960s to more than 200 today, producing some 330,000 cases of the Brunello wine annually. Brunello was the first wine to be awarded Denominazione di Origine Controllata e Garantita (DOCG) status. In addition to Brunello di Montalcino, which must be aged five years prior to release, 6 years for the Riserva, Rosso di Montalcino (DOC), made from sangiovese grosso grapes and aged one year, and a variety of Super Tuscan wines are also produced within the comune, as well as the Moscadello sweet white wines for which it was most famous until the development of the Brunello series
