Aalborghus is a half-timbered castle built by King Christian III from 1539 to around 1555 initially as a fortification. Soon it became the seat of the king's provincial governors in Northern Jutland, and after the introduction of absolutism, became used by the State County of Northern Jutland for taxes.
A building had pre-existed at the site before Christian III's castle. It stood south of the castle and is mentioned in the first documentation of Aalborghus, dating back to 1340. It was owned by Margrethe I and was the death place of King Hans in 1513 who died in a horse riding accident.
Frederick I had originally intended to destroy the initial building around 1530 and moving to a different site to convert Aalborg's Franciscan monastery into a castle. However he left the decision to his son Christian III, who later decided to demolish the original in 1539 and contracted the royal architect Morten Bussert to build a new fortified castle north of the old site, near the Liim Fjord. A barrier wall was built alongside the fjord, and later in 1633, Christian IV built a north wing facing the port, which was used as a granary for the storage of food supplies such as corn. A western wing was built to the same effect later, holding other supplies such as meats and fish.
The southern facing wing was created between 1808 and 1809 but all that remains today of the original castle is the east wing. Between 1954 and 1964 the old granaries underwent full renovation by the Royal Inspector of Listed Buildings, Leopold Teschl, who converted them into council offices.
References:Trenčín Castle is relatively large renovated castle, towering on a steep limestone cliff directly above the city of Trenčín. It is a dominant feature not only of Trenčín, but also of the entire Považie region. The castle is a national monument.
History of the castle cliff dates back to the Roman Empire, what is proved by the inscription on the castle cliff proclaiming the victory of Roman legion against Germans in the year 179.
Today’s castle was probably built on the hill-fort. The first proven building on the hill was the Great Moravian rotunda from the 9th century and later there was a stone residential tower, which served to protect the Kingdom of Hungary and the western border. In the late 13th century the castle became a property of Palatine Matúš Csák, who became Mr. of Váh and Tatras.
Matúš Csák of Trenčín built a tower, still known as Matthew’s, which is a dominant determinant of the whole building.