The Swedish royal family owns more than a dozen palaces and residences across the country.

Headed by King Carl XVI Gustaf and his wife, Queen Silvia, the Swedish royal family may not get as much attention as their British counterparts, but they're every bit as noteworthy for their controversies, celebrations, and sprawling properties.

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Whether they're ruling Sweden or away on summer vacation, the Swedish royal family has an impressive list of real estate. Some of the properties are famous for their opulence, others for their intriguing design - and one is best known as a former makeshift prison.

As Princess Estelle, King Carl's oldest grandchild, turns 9 on February 23, here a who's who of the Swedish royal family and a look at some of their palaces.

King Carl XVI Gustaf is the ruling monarch of Sweden.