CNC Stone Carving
bschne
445 points
124 comments
October 28, 2026
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Discussion Highlights (20 comments)
vessenes
Oooh this is cool. Create gothic-esque designs in stone construction using CNC. I like the apology right at the top: "medieval builders were always on the forefront of technology". Word.
yendor44
This is the same group of monks that run mystic monk coffee. I'm very fond of the Paradiso blend and am currently warming up to the thanksgiving blend though it wasn't my favorite at the start of the bag.
dyauspitr
When AI wipes out programming jobs over the next few years, do you think we will see a revival in the number of young men going into monkhood?
nrh
Anyone who digs this should take a look at the art (and process) of Barry X Ball. https://www.barryxball.com/ https://www.instagram.com/barryxballstudio/
smstl
Adore everything about this
shellfishgene
Wow, the monks are not messing around either, they built a full monastery with cathedral and all in gothic style! https://newmountcarmelfoundation.org/building-a-mountain-mon...
opengrass
For a second I thought the guy at the computer is the CNC statue.
roughly
This is both incredible and I think… “misses the point” is the wrong phrase, but maybe omits something both subtle and crucial in the process. A gothic cathedral is both an incredible work of art and also the work of hundreds or thousands of hands over decades and centuries - you are looking not just at the final product, but at the love and commitment it took to make that work of art, the long-term dedication and belief that it should exist even if we don’t live to see it exist. You’re looking at an expression of love not just for God and for art and beauty, but for future generations and people we’ll never know. The time and effort isn’t an unfortunate part of the process, it’s intrinsic to what we feel when we witness the cathedral - a connection to others, reaching both ways. I understand why the monks have developed this technique, and I don’t disagree with them - the act of building a gothic cathedral is outside the capacity of modern society. I’ll never begrudge someone a hack to preserve some beauty in this machine we’ve created. But I can’t help but feel like they’ve created a facsimile of a cathedral - they’ve created the palace at Disneyland, not Notre Dame.
weirdish
I've always wondered why we haven't seen a broad architectural movement returning to highly ornate decorative facades now that technology has made this kind of thing (more) possible. We could be having so much more fun in architecture right now!
wolframhempel
Before anyone complains that this removes the human aspect of art, it's worth stressing that sculptors have always looked for ways to automate work and save time (as the website itself points out). As far back as ancient Egypt, grids and measuring tools were used to reproduce figures at different scales. Roman workshops churned out copies of Greek statues in marble and bronze, using casts and moulds. From the 18th century onwards, sculptors used outright pointing machines to transfer models into marble. James Watt, the steam engine guy, even built a mechanical sculpture-copying machine that could (somewhat) automatically reproduce reliefs and medallions. Gothic architectural decoration wasn't about expressing the inner world of its makers in the way we think of art today. Much of it was produced by large masonry workshops using standardized geometry, wooden templates and repeated designs. So, yeah, using a CNC machine is truly Gothic.
foota
Finally, I can write my code as it was intended.
ajw287
... and the audience is too mature to mention that the internet stole the acronym Computer Numerical Control, so its often shortened to Numerical Control to make it safe to search?
ricardobeat
I love this story. They started roasting coffee and saving money for nearly a decade, until they could buy land in the mountains, and then set out to build a medieval monastery entirely in stone and developing the CNC machining. It's amazing what people can do when they have a goal.
soci
Worth noting that the stonemasons of Sagrada Familia (the catholic basilica Barcelona) have been using CNC to carve it's stones since early 1990s. Most Barcelonians thought they would never see the temple finished in their lifetimes, myself included. Part of the progress that made its completion possible this year is thanks to this technology improving over time. EDIT: Actually, it’s a mix of CNC roughing to shape the stone, followed by manual finishing. According to the Sagrada Família’s website, this allows each stone to remain a unique piece of craftsmanship while significantly speeding up the process.
ButlerianJihad
It may be worthwhile noting that the medieval Carmelites have pulled off some impressive civil engineering projects in their own right. St. John of the Cross himself is credited with the design and construction of an aqueduct for their monastery in Spain. https://www.ocarm.org/en/item/4545-st-john-of-the-cross-myst... It may seem from our perspective that monasteries are full of prayer and spiritual endeavors, but they are also the site of a large amount of manual labor and highly-educated expertise that can be brought to bear on large projects like this.
MisterMunchkin
It would be fun to be able to order custom stone statues or artwork made like this.
sroussey
I've been watching these robots carve stone on instagram for years now...
throwaway2037
I would to love to learn more about the metals used in their drill bits. I think about oil/gas drilling and tunnel boring machines. They are facing some of the harshest conditions possible. (Imagine a tunnel boring machine trying to carve through granite rock in Manhattan or Swiss Alps. It is tough!) These CNC machines are doing similar on a "micro-scale". How often do they need to sharpen or replace these drill bits? And what is the cost?
clarkmoody
Monumental Labs[0] takes a mixed approach to autonomy and human craftsmanship. For fine detail pieces like marble sculpture, the robot takes the project from stone block to a rough, 3D printed look. Then a human craftsman does fine work and polishing. For something like a plinth on a stone structure, the robot's output is good enough since the piece will only ever be viewed from afar (e.g. street level for a balcony). [0]: https://www.monumentallabs.co/
Fricken
Reddit Cofounder Alexis Ohanian has a startup, Monumental Labs, which is applying robotic milling to stonework. The finishing process is still done by hand and appears quite labour intensive https://www.monumentallabs.co/work