The Visconti Castle of Abbiategrasso lies on the axis of the Naviglio Grande canal and it was built to protect the waterway to Milan. In the 15th century it was one of the preferred places of residence of the dukes and duchesses of Milan.
The castle was probably built at the end of the 13th century on the site of a previous fortification (castro Margazario) near a Benedictine monastery. It was enlarged by Azzone Visconti (1329-1339) and Gian Galeazzo (1378-1402). In 1438 it was restored and embellished by the Duke Filippo Maria and – lost every defensive function and easily reachable by water along the Naviglio Grande – it became his favorite country mansion.
To the castle had some inclination the duchesses of Milan. Here had a stable residence Agnese del Maino, mistress of the Duke Filippo Maria and mother of Bianca Maria. The Sforza, dukes of Milan and descendants of Bianca Maria, favored the castle of Abbiategrasso to enhance their Visconti origins.
After the Visconti-Sforza period, the castle progressively assumed again the role of a stronghold, especially during the years of the Italian Wars (1494-1559). In 1658 three towers were demolished and the fourth was cut off. In 1862 it was sold to the municipality, which in the following years obliterated the ramparts to make place to the new train station, at the same time taking care of some restorations.
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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.