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Ancient Superstructures - Season 4 Episode 5 Aachen Cathedral, Germany

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Aachen Cathedral is a 1,200-year engineering marvel. We decode the 'smart' mortar, the hidden iron ring stabilising the cupola, and the metal reinforcements that let stained glass replace stone.

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First Air Date: Nov 01, 2020

Last Air date: Oct 29, 2024

Season: 4 Season

Episode: 20 Episode

Runtime: 55 minutes

IMDb: 8.00/10 by 3.00 users

Popularity: 1.1206

Language: English, French

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