Rueda wine appellation is a mainly white wine-growing area that is widely known across Europe since the middle ages. The region is located in the province of Avilla, a subregion of Castile and Leon, in central Spain. Rueda wines are well-known for their white wines made from Verdejo grapes and are among the best in Spain. The wine-making technique of the Rueda region dates back to the 10th century. The majority of producers in Rueda have always practiced organic farming, despite the fact that it has recently become more popular throughout the wine industry.