Now under new (if anonymous) ownership, Barboursville Vineyards is celebrating its 50th anniversary this week. So amid all the commemorations of the nation’s semiquincentennial and the 50th anniversary of the Judgment of Paris tasting that put California on the world wine map, we should remember that 1976 was also when a softspoken Italian winemaker bought property in the rolling hills northeast of Charlottesville and ignited a new era in Virginia wine.