Pelplin Abbey is a former Cistercian abbey founded in 1258 by Sambor II, Duke of Pomerania. It was a daughter house of the Cistercian Doberan Abbey. It was first sited in Pogódki (Pogutken) near Kościerzyna (Berent) and re-located in 1276 to Pelplin. By decree of the Prussian government of 5 March 1823 it was dissolved. Since 1824 the church, as Pelpin Cathedral, has been the cathedral of the Roman Catholic Diocese of Pelplin. Work on the Brick Gothic building (length 80 m, height 26 m) began in 1289. The church was finished in 1323; additional work was completed in 1557.
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.