Love the floor plans of Holyroodhouse! Thanks so much for those, I've always wondered about that building.
I believe that today the royal family's s private apartments are on the second floor. But I've also read that since 1646 (when Charles I appointed the Dukes of Hamilton as hereditary Keeper, one of the Great Offices in the Royal Household in Scotland), that the Keeper maintains private ducal apartments which are said to cover a larger area of the palace than the State Apartments.
Does anyone know which floor / area is "Royal Apartments" and which are "Keeper's Apartments"?