How was a castle built in the Middle Ages? With which tools, which technology? Answers to these exciting questions can be found in Friesach in Austria's southernmost province of Carinthia.

• GS Film
• 3sat
• Gernot Stadler
• Wilhelm Deuer
• Heimo Dolenz
• Gerald Krenn
• Johannes Orsini-Rosenberg
• Susanne Ruhdorfer
• Franz Schüttelkopf
• Gerfried Sitar