The mansion has 11 bedrooms and nine bathrooms, as well as offices and meeting areas, to conduct business.
Although Zarzuela Palace is commonly referred to as the King’s residence, the Royal Palace of Madrid is actually listed as the official residence of the King, though only state business is conducted there.
The Royal Palace of Madrid is the largest palace in Europe, despite the Spanish monarchy not living there.
At Zarzuela, King Felipe and Queen Letizia have offices on the first floor and an audience room where they receive official guests.
source: express.co.uk