Delicious Flanders red-ale style beer , a blend of 8 and 18 months old beers following the careful maturation in oak casks. After a primary and secondary fermentation, this ale is matured in oak barrels for 18 months. The final product is a blend of a younger 8-month-old beer with an 18-month-old beer. The name of the beer is meant to honour Duchess Mary du Burgundy. This amazing beer has a characteristically sour, fruity flavour.