Photo: Unknown authorUnknown author · Public domain · via Library of Congress via Wikimedia Commons
Cathedral · Paris, France
Sacré-CœurSuspected
- Dated
- Dated 1875–1914
- Declared purpose
- Basilica of the Sacred Heart
- Today
- Survives, still a basilica
- Build time
- About 39 years (1875–1914)
- Region
- Europe
- Architect of record
- Paul Abadie, architect: about 62 when credited (1874, born 1812). Build time on record: about 39 years (1875–1914).All architects of record →
- On the list as
- Suspected
Why it's on the list
Its piers go down through a hill full of old gypsum quarries.
Hidden history
Found, Not Built
A white domed basilica on Montmartre, standing on deep piers sunk into a hill riddled with old gypsum quarries.
Why researchers flag it
Its piers go down through a hill full of old gypsum quarries.
Piers into the hill
Its foundations go down through quarried ground on deep piers.
Self-cleaning stone
The travertine whitens with rain.
Architect of record
Paul Abadie (born 1812) was about 62 when credited with the design in 1874. The Architects of Record page asks how often a young or little-known name delivers a landmark.
Questions worth asking
- What is inside the hill under the basilica?
Possible original uses
- Cathedral or temple
What the photos show
Sources
Further viewing
Episodes from My Lunch Break (Michael Kruse), the main lens for this app. They open on YouTube.









