The Château du Hohlandsbourg is a ruined castle Wintzenheim, near Colmar. The construction of the castle, on the order of the Provost of Colmar, Siegfried de Gundolsheim, dates from 1279. The site, 620 m above sea level, allowed for surveillance of Colmar and its region. In 1281, the townspeople of Colmar revolted and set fire to the castle with the help of the Bailiff, Otton d'Ochenstein.
The castle came under the control of the Ensisheims before being given in 1410 as a fiefdom to the Ribeaupierres, then Counts of Lupfen, who enlarged it. In the 16th century, the castle belonged to Lazarus von Schwendi, general of the Holy Roman Empire, who, it is said, brought Tokay vines from Hungary to Alsace. He enlarged and strengthened the castle.
With Alsace becoming French at the end of the Thirty Years' War, the castle welcomed troops who blew it up in 1637 to prevent it falling into the hands of an Austrian army.
Today Hohlandsbourg Castle offers a magnificent all-round panorama over the plain of Alsace and the Vosges Mountains. It is open to in summer season.
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.