The Château du Hohlandsbourg or Hohlandsberg is a ruined castle in the commune of Wintzenheim, near Colmar, in the Haut-Rhin département of France. It is open to the public between Easter and 11 November. History 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 t…