D'Oliveiras is a renowned winery known for its rich heritage in Madeira wine production. Established in 1820, it utilizes traditional methods that include aging wines under special conditions to enhance flavor complexity. Key grape varieties include Tinta Negra, Verdelho, and Malmsey, fueling a diverse range of styles from dry to richly sweet. D'Oliveiras has garnered acclaim for its exceptional vintage wines and unique master blends. Notably, a bottle from the 1800s was auctioned for a remarkable price, showcasing its prestigious reputation in the wine world.