15/07/2026
๐๐๐ ๐๐๐ ๐๐๐๐ ... that the Sacre-Coeur basilica is 'self-cleaning'? Amazing, isnโt it, that your newly painted white walls have grubby fingermarks all over them, yet that a 100 year old cathedral is gleaming white ... How is that possible?
The architect, Paul Abadie, selected a special (lime) stone found in the quarries of Souppes, in Seinne-et-Marne, which is resistant and impenetrable by water. When it rains, the stone releases a clever substance called โcalciteโ, which cleans the stone and keeps it white. Also the Arc de Triomphe and the bridge Alexandre III are built with the same stone.
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