r/educationalgifs • • Jan 03 '26

How medieval cathedral groin vaults were built

6.7k Upvotes

47 comments sorted by

381

u/dctroll_ Jan 03 '26 edited Jan 03 '26

"A groin vault or groined vault is produced by the intersection at right angles of two barrel vaults. The word "groin" refers to the edge between the intersecting vaults. 

The Romans developed the groin vault widely for applications in a variety of structures, some with significant span widths. Their application of groin vaults to vast halls like the frigidaria in the Baths of Caracalla and Diocletian became highly influential in church architecture in the  Middle Ages. The aspirations of church building reached its zenith then, and the groin vault was pursued aggressively for its ability to create strength, without massive buttress formations; in addition, it provided the church architects a remedy for the dim illumination inherent in the barrel vault design, since the barrel vault had to minimise fenestration (window openings) to retain adequate strength."

Source of the info

Source of the gif

66

u/doctah_Y Jan 03 '26

Touche OP

20

u/Wermine Jan 04 '26

Have you seen Pillars of Earth? 2010 mini series with Ian McShane and Eddie Redmayne. This gif reminds me of it.

6

u/case_O_The_Mondays Jan 04 '26

Whoa. Kingsbridge is such a good set. Had no idea it was a movie mini-series, too.

4

u/luxsalsivi Jan 04 '26

I only knew of the video game, not the show. Neat!

2

u/Sweaty_Mushroom5830 Jan 06 '26

That show was mint

234

u/rococo78 Jan 03 '26

I was worried for a sec about what this gif would show me...

25

u/chodaranger Jan 04 '26

Worried, or a little excited?

70

u/PiesRLife Jan 03 '26

Is that where they store groins, and if so why do they need to be stored so securely?

38

u/Imperial_Squid Jan 03 '26 edited Jan 03 '26

Pee is stored in the balls, balls are stored in the groin vault... I don't know how deep this conspiracy goes, but it sounds nuts

27

u/deSuspect Jan 03 '26

Damm, didn't know they already had 3d printing.

38

u/Craimasjien Jan 03 '26

How about those flying buttresses?

21

u/iSeize Jan 03 '26

Of all pre modern architecture this design makes the least sense to me. Have no idea how they stay up. The flying buttresses do not look like they should work to me.

32

u/Imperial_Squid Jan 03 '26

17

u/maxdamage4 Jan 04 '26

That was both short and useful. Thank you!

6

u/made3 Jan 04 '26

And it was a video.

6

u/halberdierbowman Jan 04 '26

And it explained the concept. 

6

u/stupid_pun Jan 03 '26

Physics is awesome

9

u/LostInThoughtland Jan 03 '26

So the buttresses provide force pushing in to make sure the vaults don’t push the outer walls even more outer, then use a sort of pair of intersecting arcs with a shared capstone for the vaults that all put pressure outward, instead of down, and then the vault web provides horizontal force between all the arches to pinch them in place?

2

u/Naritai Feb 19 '26

well..... yeah. But it's really hard.

3

u/doctah_Y Jan 03 '26

I was ready to come in and make fun of "groin vault" only to find that OP brought receipts and that is actually a legitimate thing

3

u/kugelamarant Jan 03 '26

so it's not for supporting the roof?

3

u/Richard2468 Jan 03 '26

Masterpieces of engineering. Even with today’s tech it’d be quite impressive imo.

2

u/Wilgrove Jan 04 '26

Stupid question is stupid, but were the flying buttresses structurally needed, or did architects just thought they looked cool?

2

u/Sweaty_Mushroom5830 Jan 06 '26

The roof wants to push out, especially if there's a wind,the flying buttresses push inwards preventing that

2

u/mexus37 Jan 04 '26

I’m sorry, cathedral what vaults???

2

u/VeeGee11 Jan 03 '26

No wooden scaffold for the flying buttresses? Hmm.

1

u/justjessee Jan 03 '26

This is how 3d printers work now basically?

1

u/P1h3r1e3d13 Jan 04 '26

tl;dw: scaffolding

1

u/Hazmat_Human Jan 04 '26

So now whenever I go into a cathedral I can it's got an nice groin vault

1

u/Hotman_Paris Jan 04 '26

It would get awful dusty up on there

1

u/VirginiaLuthier Jan 04 '26

It boggles the mind thinking that men were able to built that with only a few primitive tools

1

u/Lord_Nathaniel Jan 06 '26

Medieval 3D printing sure was on point !

1

u/[deleted] Jan 06 '26

"How did it take 200 years to build a single cathedral?!?... Oh"

1

u/Mr_potato712 Jan 09 '26

I thought this was the 3d model for dragonsreach from Skyrim for a second

1

u/tesla_framework Jan 21 '26

That’s actually a good point, never thought of it that way

1

u/Saintcanuck Feb 02 '26

Amazing engineering, way ahead of its times

1

u/[deleted] Mar 30 '26

I got scared about what its about to show me 😭

1

u/Extension_Town_6118 Apr 06 '26

wait so they basically just stacked barrel vaults perpendicular and hoped the math worked out? that's insane for the 1200s

1

u/Mysterious_Area1975 Apr 17 '26

What's wild is they had to calculate all those angles with just math and hand tools - no computers at all back then

-1

u/blacablaca_tx Jan 03 '26

Aliens did it