Caves of Maastricht

One of the caves

The Caves of Maastricht, also known as the caves of Mount Saint Peter[1] or the Maastricht Underground, are a collection of limestone quarries in Maastricht, the Netherlands, the origins of which date back to the 13th century.

They were originally dug to mine chalk.[2] In total, a network of 20,000 tunnels were cut into the stone, of which 8,000 are still intact.[3]

The caves were eventually no longer used for mining, as the value of lime dropped. Over some hundreds of years, art was drawn on the cave walls, providing an attraction to tourists who can tour some of the cave sections.[1][4][3]

During World War II, the cave complex was used to store many valuable paintings and armaments that could be used against the Germans, including a proposed force of 30 tanks that would sortie against the Germans that was timed to attack at the same point of liberation.[citation needed] In addition to the military, over 6,000 citizens took shelter in the caves during World War II.[1] After the war, there were plans to utilise the underground complex as a bomb shelter.

Among the paintings hidden in the caves during WWII was The Night Watch by Rembrandt van Rijn. The canvas which measures 363 × 437 cm was detached from its frame and rolled into a large cylinder.

A large portion of the former tunnel system no longer exists as the encompassing limestone was quarried in an open-cast mine operated by ENCI. Quarrying was ceased in 2018.[5]

## See also

* Mosasaur
* Kőbánya cellar system
* Mines of Paris
* Odessa Catacombs
* Beer Quarry Caves

## References

1. ↑ 1.0 1.1 1.2 "A DUTCH TREAT" (in en-US). The New York Times. 1981-11-08. ISSN 0362-4331. https://www.nytimes.com/1981/11/08/travel/a-dutch-treat.html.
2. ↑ de Swart, Herman (1993). "Karst in the Netherlands". Bulletin de la Société géographique de Liège 29: 109-113. https://popups.uliege.be/0770-7576/index.php?id=3342.
3. ↑ 3.0 3.1 "The Caves of Maastricht" https://discoverlimburg.nl/caves-maastricht/
4. ↑ "The astonishing caves of Maastricht" (in en). https://adrianprattinholland.blogspot.com/2017/05/the-astonishing-caves-of-maastricht.html.
5. ↑ de Graaf-Weerts, Gabi (4 June 2020). "ENCI dicht: productie van Maastrichts cement definitief ten einde". WijLimburg. https://www.wijlimburg.nl/nieuws-overzicht/enci-dicht-productie-van-maastrichts-cement-definitief-ten-einde/.

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Man-made and man-related Subterranea

Natural features|

* Cave
* Cenote
* Grotto
* Sinkhole

Civilian features|

* Basement
* Burial vault (tomb)
* Borehole
* Catacombs
* Dungeon
* Dugout (shelter)
* Dry well
* Earth shelter
* Erdstall
* Fogou
* Hypogeum
* Manhole
* Rapid transit
* Rock-cut tomb
* Root cellar
* Tunnel
* Utility vault
* Underground city
* Well
* Wine cave
* Secret passage
* Semi-basement
* Stepwell
* Storm cellar
* Smuggling tunnel
* Ventilation shaft

Military features|

* Air raid shelter
* Bunker
* Blast shelter
* Casemate
* Fallout shelter
* Missile launch facility (silo)
* Underground base
* Underground hangar
* Spider hole

Mining, quarrying, and underground construction|

* Rock-cut architecture
* Subsurface utility engineering
* Tunnel construction
* Underground mine ventilation
* Underground mining (hard rock)
* Underground mining (soft rock)

Related topics|

* Cave dweller
* Caves of Maastricht
* Civil defense
* Coober Pedy
* Houston tunnel system
* Kőbánya cellar system
* Tunnel warfare
* Tunnel network
* Trench warfare
* Underground living
* Underground City (Beijing)
* Underground City, Montreal
* Mine exploration
* Mines of Paris
* Mole people
* Naples underground geothermal zone
* Sapping
* Subterranean London
* Subterranean Toledo
* Subterranean warfare
* Subterranean fiction

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