The first castle built on the rock spur above Bolzano by the Lords of Haselberg dates back to the 12th century. This Haselberg castle is today known as Castle Flavon. Already in those days the fortress boasted a circular wall at its east and south flank, which could easily be assaulted. The great hall was located just above the porphry rocks. It is presumed that also a donjon already existed in these days. Only few documents testify the renovations in the 13th and 15th century. Between 1474 and 1541 the castle was repeatedly changend and enlarged. Still today the renovations that were carried out under this rule is in great parts preserved.
A double arcade hall, a further great hall in the north of the castle as well as a new defence wall were added. Moreover the rooms of the three-winged castle were lushly decorated with frescoes. From 2001 to 2002 Castel Flavon was refurbished under the direction of the architect Dietmar Dejori. Overbuildings from the 18th century were eliminated from the ancient double arcades, cellars were laid open and the collapsed great hall in the north was rebuilt in order to restore the original three-winged form of the building.
Today Castel Flavon hosts a restaurant as well as various rooms that are used for seminars, congresses and celebrations. Worth noticing are also the frescoes in the interior, illustrating emperors and generals as well as scenes of the antique myth of Apollo.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.