Penhallam is the site of a fortified manor house near Jacobstow in Cornwall. There was probably an earlier, 11th-century ringwork castle on the site, constructed by Tryold or his son, Richard fitz Turold in the years after the Norman invasion of 1066. Their descendants, in particular Andrew de Cardinham, created a substantial, sophisticated manor house at Penhallam between the 1180s and 1234, building a quadrangle of ranges facing onto an internal courtyard, surrounded by a moat and external buildings. The Cardinhams may have used the manor house for hunting expeditions in their nearby deer park.
By the 14th century, the Cardinham male line had died out and the house was occupied by tenants. The surrounding manor was broken up and the house itself fell into decay and robbed for its stone. Archaeological investigations between 1968 and 1973 uncovered its foundations, unaltered since the medieval period, and the site is now managed by English Heritage and open to visitors.
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.