Thanks to Roberto for sending me this beautiful postcard of the Royal Palace of Madrid.
The Palacio Real de Madrid (literally: Royal Palace of Madrid) is the official residence of the Spanish Royal Family at the city of Madrid, but is only used for state ceremonies. King Juan Carlos and the Royal Family do not reside in the palace, choosing instead the more modest Palacio de la Zarzuela on the outskirts of Madrid. The palace is owned by the Spanish State and administered by the Patrimonio Nacional, a public agency of the Ministry of the Presidency. The palace is located on Calle de Bailén (Bailén Street), in the Western part of downtown Madrid, East of the Manzanares River, and is accessible from the Ópera metro station. Several rooms in the palace are regularly open to the public, except during state functions.
In Spanish, it is sometimes incorrectly called “Palacio de Oriente” by confusion with the “Plaza de Oriente”, the square which lies to the East (Oriental) side of the palace.
The palace has 135,000 square meters (1,450,000 sq ft) of floor space and contains 3,418 rooms. It is the second largest palace in Europe by floor area after Louvre Palace. The interior of the palace is notable for its wealth of art and the use of many types of fine materials in the construction and the decoration of its rooms. These include paintings by artists such as Caravaggio, Velázquez and Francisco de Goya and frescoes by Corrado Giaquinto, Juan de Flandes, Giovanni Battista Tiepolo and Anton Raphael Mengs. Other collections of great historical and artistic importance preserved in the building include the Royal Armoury, Porcelain, Watches, Furniture, Silverware and the world’s only complete Stradivarius string quintet.
you can read more about it, here.