How was the construction of Notre-Dame de Chartres possible? | Full documentary

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Notre-Dame de Chartres is the first French cathedral to be listed as a UNESCO World Heritage Site. Begun at the end of the 12th century, its construction lasted less than 30 years: a unique case in the history of cathedrals. To build this monument, both massive and graceful, the master builders used and perfected the most cutting-edge technical innovations of the time. How was this incredible feat possible, even though some construction methods were still ancient? Drawing on the testimonies of leading specialists and three-dimensional representations of the monument, discover the mysteries of this epic journey worthy of the greatest builders of the Gothic era.