The rooms on the second floor of the eastern row is called the Prins Bertil's Apartment after its latest noted tenant. King Adolf Frederick used the rooms as his own apartment. During the reign of King Gustav III, it was Duke Charles' apartment and later when King Charles XIV ruled, it was used for some time by Crown Prince Oscar (I). Oscar had one of the rooms decorated in a neo-gothic style in 1828. The room became known as the "Götiska" (the Geatish Room). King Charles XV also used the apartment as his quarters and during the reign of King Oscar II it was used by the Crown Prince Gustaf (V). Later it was Prince Bertil's apartment until he died in 1997. After the prince's demise it has been used for visiting heads of state, interviews and seminars.