By the end of the Gothic period, the French had created 80 cathedrals and tens of thousands of churches. But how did they lift stones weighing up to a ton to create their lofty spires? A team including a film set designer, a structural engineer and construction workers attempt - not without bitter argument - to re-create a medieval crane next to a Norman abbey.
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Ready to Watch Channel 4 UK Documentaries, Season 2011, Episode 20?