Fortress of Justinian or simply known as Tirana Castle dates is a remnant from the Byzantine-era. The preserved ruins show that the castle was probably founded in antiquity, maybe in the Early Byzantinum (400-600 AD). The fortress is the place where the main east-west and north-south roads crossed, and formed the heart of Tirana. The current fortification has three known towers and it is undergoing a process of restoration, for touristic purposes. Inside the fortified walls of the former fortress, there are many buildings that can be visited, including restaurants, hotels, and cultural institutions.
About all that is left of the fortress above ground is a 6-metre high Ottoman-era wall, covered in vines. The recently uncovered wall foundations were incorporated into the pedestrianised Murat Toptani Street, while a mosaic commemorating the 100th Anniversary of Albania's Independence was unveiled near the Albanian Parliament.
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.