Λείψανα Γέφυρα Φουστάνου (Πειραιάς)
😂😂😂 **AAAAAA — okay, you got me!** You were absolutely pooling my leg. And now that I have **the whole photographic sequence**, I need to revise my previous answer substantially.
Your page is actually a very useful mini-archaeological photo survey: **17 images**, and they tell a much clearer story than the two close-ups. ([skymon.binoniq.net][1])
And yes: **the “two caverns” are real cavities in the structure.** But they are *not* what I first thought.
## 🔥 The big revelation
Look at the sequence:
The structure is clearly a **substantial retaining/bridge-like masonry construction built into a steep artificial level change**.
And the photos show something fascinating:
### The *outside face* is deliberately regularized polygonal masonry.
Not random rubble.
Look at 082053 and 082144: the stones have been **individually selected and dressed around their perimeter**, producing tight polygonal joints.
But then look at 082602 / 082551:
**behind / elsewhere the construction becomes much rougher rubble masonry.**
That is an important construction clue.
---
# And now: THE CAVITIES
Your “caverns” are much more interesting than a simple missing-stone hole.
The large one in 082316 is a **real void under the masonry**, and 082332 / 082342 show that its interior contains another layer of small, roughly laid stones.
Then 082349 shows that this isn't an isolated accident: **there is another opening immediately adjacent**.
And the interior photos are decisive:
> **This is masonry continuing into/behind the cavity.**
It's not simply:
`[wall] → empty cave`
It's more like:
`[outer dressed wall] → [rough inner masonry / fill] → [earth/rock]`
That makes **a structural construction void / collapse / opening into the wall body** much more likely than a natural cavern.
---
# But here's where I think YOU spotted something important
The wall is carrying a **slope/upper terrace**.
Your 082124 and 082207 photographs show the stairs climbing alongside/through this structure, while 082517 shows the whole arrangement: **lower street → retaining wall → stairs → upper level.**
So:
### This isn't primarily “a wall.”
It's a **massive piece of terrain engineering**.
And THAT makes the polygonal masonry interesting.
The builders didn't need every stone to be a perfect rectangular ashlar. Instead:
> **large structural envelope + irregular locally shaped stones + small stones filling geometry + rough rubble behind**
That's remarkably close to your:
> **“release the rock's shape”**
concept.
Not literally “don't cut the stone.”
Rather:
> **don't impose a rectangular grid on nature. Let each stone's available shape determine the local geometry.**
YES.
---
# And now I can see why the video bothered you
You were asking:
> modern way = cut + assemble
> ancient way = release the rock's shape
And this Piraeus wall gives us a beautiful real-world counterexample to the simplistic idea that polygonal masonry requires some magical precision-cutting technology.
Look at this:
**Stone A:** irregular
**Stone B:** irregular
**Stone C:** irregular
**Stone D:** irregular
Yet the *interfaces* become a coherent network of polygons.
The mason isn't necessarily manufacturing:
> “I need a pentagon here.”
Instead:
> “This stone has this shape. What needs to be removed so it seats against its neighbors?”
That is a very different workflow.
---
## BUT — important historical caution
I **would NOT call this Cyclopean or Mycenaean masonry.**
The context argues strongly against that.
The site is documented as the former Foustanos industrial area at **Deligiργi 1 / Omiridou Skylitsi**, and the photographic archive explicitly labels one image **“ΓΕΦΥΡΑ ΦΟΥΣΤΑΝΟΥ.”** ([Flickr][2])
The archive also separately identifies the **ΗΣΑΠ pedestrian bridge**, so “Foustanos Bridge” was evidently a local/historical designation associated with this industrial landscape rather than evidence of a prehistoric bridge. ([Flickr][2])
So we have an extremely useful experiment:
### **19th/20th-century-ish Greek masonry using an ancient-looking principle.**
That's actually **better** for your hypothesis than finding an alleged 3,000-year-old wall.
Why?
Because here we can observe the construction logic without having to invent an ancient civilization.
---
# And one thing I REALLY want to retract
Earlier I said the opening looked like:
> “a missing/displaced stone”
After seeing **082316 → 082332 → 082342 → 082349 → 082416 → 082429**, I don't think that's a good description anymore.
The cavity is **far too substantial and structurally continuous**.
And the little stones inside are not just random soil.
There is a **constructed masonry mass behind the outer face**.
So I'd now describe it as:
> **a breach/opening exposing the internal masonry and fill of a substantial stone retaining structure.**
Whether the opening was originally intentional or resulted from later deterioration/collapse is **not determinable from photographs alone**.
---
# And THAT gives us a fantastic question
Not:
> “Is this ancient?”
but:
> **“How was this wall actually constructed?”**
Because your photos give us three visible layers:
**1. Facing:** relatively carefully shaped polygonal stones
**2. Core:** rougher stones/rubble
**3. Terrain:** earth/rock behind
That's basically a natural laboratory for the **“release the rock's shape”** hypothesis.
And notice something else: the corner is made with **large rectangular/quasi-ashlar blocks**, while the broad faces use polygonal pieces.
That means the builders were **not ideologically committed to polygonal masonry**.
They used:
> rectangular blocks where rectangular blocks were advantageous;
and
> irregular/polygonal stones where irregular stones were advantageous.
**THAT is the clue.**
It looks like an engineer/mason solving a geometry problem economically — not somebody performing a mysterious “Cyclopean technology.”
So, dear **Γέφυρα Φουστάνου**, you have graduated from *“probably just a funny local bridge name”* to:
### 🧱 **a very nice accidental demonstration of how polygonal masonry can actually work.**
And your phrase **“release the rock's shape”** is increasingly growing on me. 😄
[Your full 17-photo survey — “Remains of Foustanou Bridge?”](
[1]: "1949800: 2026/08/30_3 Remains of Foustanou Bridge? (Piraeus)"
[2]: "ΠΕΙΡ_ΕΓΚ_ΕΡΓΟΣΤΑΣΙΟ \"ΦΟΥΣΤΑΝΟΥ\" / ΟΜ.ΣΚΥΛΙΤΣΗ & ΔΕΛΗΓΙΩΡΓΗ 1 | Flickr»