When Napoleon invaded Spain, Charles IV instructed trusted advisers to hide the crown treasures. They buried them in the walls of the Aranjuez castle rooms, cutting off pieces of drapery for later identification of the rooms.
In 1808, Napoleon’s brother Joseph was established on the Spanish throne and as somewhat of an amateur interior designer decided to redecorate the palace. Only late in the 20th century did a plumber discover a collection of antique clocks in a wall but the bulk of the treasures has remained hidden for more than 200 years. It won’t be easy finding them. The castle has 365 rooms. In comparison, the White House has 132 rooms, including 16 family-guest rooms, 1 main kitchen, 1 diet kitchen, 1 family kitchen, and 35 bathrooms.