Nordborg Castle was, according to Saxo, founded by Svend Grathe under the name Alsborg. Hence, this can be dated to around 1150. Alsborg was built whilst the Wends still dominated the Danish coast; its location a few kilometers inland meant that the castle could not be attacked without warning, and the local population had a better chance of taking refuge there. The first written evidence of Alsborg is from the end of the 12th century. From this it is known that Bishop Valdemar of Slesvig was held prisoner at Alsborg between 1192 and 1197. After Sønderborg Castle was built, Alsborg was renamed Nordborg.
Nordborg was part of the King's properties in the Middle Ages, and was on several occasions a source of income for the king's widow. In 1571 Frederik II’s brother Hans the Younger inherited his mother Dorothea's possessions of Als and Sundeved including Nordborg. Hans was an enterprising man, who in the next 50 years constantly expanded and improved his properties. There was a series of building projects in and around Nordborg Castle. Upon Hans the Younger's death in 1622 his possessions were divided into separate dukedoms, including Nordborg, which went to his son Hans Adolf. Hans Adolf died only two years later and so the dukedom then went to Hans the Younger's other son Frederik.
Nordborg was occupied several times during the Swedish wars, first by the Swedes, then by the Brandenburgian and Polish troops and finally by Swedish troops until peace came in 1660. In 1665 fire broke out in the castle, and it burnt down. Duke Johan Bugislaw went bankrupt and forfeited his estate, which reverted next to August of Plön. In 1678 rebuilding of the castle began, and at this time the ducal coat-of-arms was placed over the castle entrance.
In 1730 Nordborg was taken back into crown possession. Nordborg had an estate of around 400 hectares, but in the following decades the land was turned into farms and in 1766 the castle was sold to a private owner and some of the buildings were demolished and sold for building materials.
In 1909 the castle was purchased by Nordborg town. It was the pro-German Mayor Klinkers' dream to build a high school, which would be a counterweight for the Danish high schools north of the border. The castle was thereafter restored by the architect Eugen Fink, and in 1910 the castle was leased out to the German high school association inNorthern Schleswig. After the reunification in 1920 the castle was bought by the merchant Johan Hansen. He established Nordborg Slot Foundation, which since 1922 has run a Danish boarding school at the castle.References:
The Palazzo Colonna is a palatial block of buildings built in part over ruins of an old Roman Serapeum, and has belonged to the prestigious Colonna family for over twenty generations.
The first part of the palace dates from the 13th century, and tradition holds that the building hosted Dante in his visit to Rome. The first documentary mention notes that the property hosted Cardinal Giovanni and Giacomo Colonna in the 13th century. It was also home to Cardinal Oddone Colonna before he ascended to the papacy as Martin V (1417–1431).
With his passing, the palace was sacked during feuds, and the main property passed into the hands of the Della Rovere family. It returned to the Colonna family when Marcantonio I Colonna married Lucrezia Gara Franciotti Della Rovere, the niece of pope Julius II. The Colonna"s alliance to the Habsburg power, likely protected the palace from looting during the Sack of Rome (1527).
Starting with Filippo Colonna (1578–1639) many changes have refurbished and create a unitary complex around a central garden. Architects including Girolamo Rainaldi and Paolo Marucelli labored on specific projects. Only in the 17th and 18th centuries were the main facades completed. Much of this design was completed by Antonio del Grande (including the grand gallery), and Girolamo Fontana (decoration of gallery). In the 18th century, the long low facade designed by Nicola Michetti with later additions by Paolo Posi with taller corner blocks (facing Piazza Apostoli) was constructed recalls earlier structures resembling a fortification.
The main gallery (completed 1703) and the masterful Colonna art collection was acquired after 1650 by both the cardinal Girolamo I Colonna and his nephew the Connestabile Lorenzo Onofrio Colonna and includes works by Lorenzo Monaco, Domenico Ghirlandaio, Palma the Elder, Salviati, Bronzino, Tintoretto, Pietro da Cortona, Annibale Carracci (painting of The Beaneater), Guercino, Francesco Albani, Muziano and Guido Reni. Ceiling frescoes by Filippo Gherardi, Giovanni Coli, Sebastiano Ricci, and Giuseppe Bartolomeo Chiari celebrate the role of Marcantonio II Colonna in the battle of Lepanto (1571). The gallery is open to the public on Saturday mornings.
The older wing of the complex known as the Princess Isabelle"s apartments, but once housing Martin V"s library and palace, contains frescoes by Pinturicchio, Antonio Tempesta, Crescenzio Onofri, Giacinto Gimignani, and Carlo Cesi. It contains a collection of landscapes and genre scenes by painters like Gaspard Dughet, Caspar Van Wittel (Vanvitelli), and Jan Brueghel the Elder.
Along with the possessions of the Doria-Pamphilij and Pallavacini-Rospigliosi families, this is one of the largest private art collections in Rome.