what is a flying buttress
A flying buttress is an external stone support that uses an arched “arm” to carry the sideways push of a heavy roof or vault down into a solid pier set away from the wall.
Quick Scoop: What is a Flying Buttress?
Think of a tall Gothic cathedral wall: the stone ceiling and roof push outwards and could make the wall bulge and crack. A flying buttress solves this by:
- Using a sloping arch (the “flyer”) that springs from high on the wall.
- Connecting that arch to a heavy vertical pier or buttress a short distance away.
- Channeling the sideways thrust of the roof or vaulted ceiling safely down into the pier and then into the ground.
Because the support arch “leaps” over open air instead of being solid all the way to the ground, it looks like it’s flying—hence the name.
Why it mattered
Flying buttresses were a key innovation of Gothic architecture (think Notre- Dame in Paris and other medieval cathedrals). They allowed builders to:
- Make churches much taller without the walls collapsing.
- Thin the walls and open them up for large stained-glass windows, since the main support was now outside.
- Add decorative pinnacles on the piers, which also add weight and improve stability while enhancing the dramatic look.
One quick mental picture
Imagine you’re leaning hard against a wall to keep it from falling, arms outstretched, feet braced a bit away from the wall. There’s a gap under your arms where someone could walk. That shape—your body as the pier, your arms as the arch, the wall as the cathedral wall—is essentially a flying buttress in human form.
TL;DR: A flying buttress is a stone arch-and-pier support built outside a wall to catch and redirect the sideways thrust of heavy roofs and vaults, letting Gothic cathedrals grow taller and lighter with huge windows.
Information gathered from public forums or data available on the internet and portrayed here.