Single-quinta, or single-vineyard, vintage Porto is produced only in exceptional years in which a general vintage is not declared. Quinta de Vargellas, celebrated as one of the top 100 vineyards in the world, has been part of the Taylor Fladgate estate for more than a century. It has the highest percentage of old vines of any quinta in the Douro, with 60% over 75 years old. All grapes undergo the traditional foot treading method, ensuring their fullest expression. Fermentation is halted by the addition of grape spirits before all the residual sugar has been fermented, creating a sweet, fortified wine. Following two years in wood, the wines are bottled unfiltered and will continue maturing for decades.