The collection was reunited in the 1960s in a newly built complex in the Campo del Moro gardens, and it was decided that some carriages would be used for the ceremony of receiving foreign ambassadors' credentials.
The collection is unique for the quantity, variety and quality of the vehicles preserved. Notable items include the travelling coach of the Emperor Charles V; the so-called Black Chariot, a prototype from the seventeenth century; the Golden Saloon, an example of mid-eighteenth century models; the grand gala carriages belonging to the reigns of Charles IV and Ferdinand VII, and the great coaches known as Conchas, Cifras, Corona Ducal, Amaranto and Tableros Dorados, which are all French and date from the late eighteenth century. The carriages manufactured in Spain include the Royal Crown, as well as the so-called Mahogany and Landó de Bronces, which together make up the so-called Royal Train that is used in official royal parades.
There are also notable gala and half gala carriages, saloons and Paris carriages that are used in ceremonies, or those that were intended for leisure, sport, travel and day trips. The collection also includes some examples of children's carriages, such as the sleds or the small cradle carriage made for the Princess of Asturias, later Isabella II.