Knappogue 1951 is the oldest and rarest Irish Whiskey in the world. Aged for 36 years in sherry casks, it was distilled in 1951 and bottled in 1987. Knappogue Castle 1951 is a truly special Irish Whiskey. The legacy began with a man named Mark Edwin Andrews nearly half a century ago. In the 1960s, he bough the remaining casks of pure pot still whiskey distilled at the prestigious B. Daly Distillery in Tallamore, Co. Offaly. He named it Knappogue Castle Whiskey, after the castle in the west of Ireland that he owned. Knappogue Castle 1951 remains the last remaining stock from his original collection.