After the 2019 fire that gutted the roof, it seems especially appropriate to admire Notre Dame, which dates to the 12th Century. Goal of the restorers is to re-open the cathedral by 2024, when France plays host to the Olympic games.
Picking up after the fire, architects discovered that iron “staples” were used throughout the building to bind stones. Thus, Notre Dame was the first Gothic cathedral to use the technique, which helped make it the tallest cathedral of its age. A row of staples on one wall suggests iron was used systemically as early as the 13th Century. Previously, architects had believed the iron stemmed from much more modern building upgrades.
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