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How Cologne Cathedral was Illuminated Before Electricity | Blowing Up History
13KLikes
821,284Views
2017Apr 23
Blowing Up History investigates Europe’s masterpiece of gothic engineering, Cologne Cathedral, pulling apart its stones, tiles and pillars to explore the secrets of the medieval architects. Subscribe to Discovery TV for more great clips: http://www.youtube.com/subscription_c... Follow Discovery on Twitter:   / discoveryuk  

Discovery UK

4.8M subscribers
Blowing Up History
by Discovery UK