D'Oliveira is one of the greatest Madeira shippers, and one of the few who have survived from the pre-phylloxera era. The firm was originally founded in 1820, its cellars date back to 1619, and it is still owned by the same founding family. However, the real jewel of the firm is their priceless stocks of extremely old Madeira wine, all from their own vineyards and cellars. D'Oliveira believes that all Madeira ages best in cask, and all of its vintages are kept in wood for a minimum of 20 years, some for over 90 years! They bottle only enough wine to meet their short-term needs, keeping their valuable stocks in cask as long as possible. These wines are the reference point for vintage Madeira and are some of the oldest and most complex wines in existence today.