Palace of Anna Vasa, a Swedish Princess, was built before 1564 at the Teutonic castle area by the Brodnica County starost Rafał Działyński, partly with the use of the Gothic walls. The palace was rebuilt and expanded as a residence by Anna Vasa of Sweden in the years 1605-1616 then it was the seat of successive starosts. Burned by Russians in 1945 and reconstructed in 1969. During its existence there resided starosts of prominent families. From the early 17th century Brodnica county was granted to members of the royal family. Besides Anna Vasa of Sweden the Brodnica starosts were: Constance wife of Polish King Sigismund III Vasa, his daughter Anna Catherine, wife of King Wladyslaw IV - Cecilia Renata, and his advisor and the Great Crown Chancellor Jerzy Tęczyn Ossoliński, Maria Kazimiera - wife of John III Sobieski, Crown Hetman Marcin Kalinowski and the Great crown Marshal Marshal Francis Balinski. Currently it houses a library and museum.
References:Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.