The Fortress San João Baptista da Foz do Douro was built in the late sixteenth century to better protect the coast and the mouth of the Douro River. The monument is occupied today by the Regional Delegation of the Institute of National Defense. It is a fine example of military architecture. The original basic structure was enhanced with more recent bulwarks. The Lawn Tennis Club da Foz is located at the foot of the Fort.
Visits to the Fort are free on weekdays between 9h and 17h30. There are no official guided tours, but if you are part of a large group, it is advisable to contact the Fort ahead of time to ensure that the visit does not disturb its activities.
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.