Limons Chrisme Disc (Merovingian Gold Applique, Puy-de-Dôme)
The Limons disc is a late-sixth / early-seventh-century Merovingian gold applique recovered at Limons (Puy-de-Dôme, Auvergne) and acquired by the Musée d'Archéologie Nationale from the architect Victor Gay in 1855. The object is a lost-wax-cast gold disc whose surface carries a Chrismon (Chi-Rho monogram, ☧), a frontal human mask, and a set of zoomorphic motifs in a peripheral register. In the archive's FFT symbol-classification framework the Limons disc is a composite level-1 signature — a cross-class primary glyph (the Chrismon) seated inside a wheel-class circular carrier, with the zoomorphic frieze supplying higher-frequency rim harmonics. This composite is the diagnostic spectral profile the archive associates with iconographic-overwrite artifacts: the cruciform axial glyph is physically superimposed on the isotropic solar-disc substrate rather than replacing it, and the pre-Christian zoomorphic register survives as demoted ornament at the circumference. The object therefore functions in the archive's corpus as a material type-case for the same operation that doctrine-storm-god-overwrite identifies at the narrative level in the mušḫuššu → Marduk-attribute substitution: same carrier, inverted sovereignty, residual substrate visible at the periphery.
Claims
c0001 — The Limons disc resolves as a wheel-carrier-dominant level-1 FFT composite with a subordinate cross-class Chi signature and a diagnostic n-fold frieze harmonic
The disc's circular gold field is a wheel-class carrier in the FFT sense: a continuous-rotational (C∞) substrate whose baseline spectrum is the low-frequency, rotationally isotropic energy distribution defined in symbol-fft-wheel c0001. Superimposed on this carrier is the Chrismon, a cross-class primary glyph whose Chi component contributes C2-symmetric angular power per symbol-fft-cross c0001. The archive classifies the object as a composite level-1 signature — cross-on-wheel with rim-harmonic frieze — rather than assigning it to a single family. The schematic FFT pass (src/analysis/limons_disc_fft.py; results in docs/analyses/limons-disc-fft/) quantifies the composite under the archive's standard pipeline (grayscale → threshold → normalize → centroid-align → DFT) on procedurally-generated geometry for all three candidate rim counts n ∈ {3, 4, 6}. The pass shows that the wheel-class isotropic baseline retains the majority of angular power across all variants (P(0) ≈ 0.73–0.77), the Chi's fundamental C2 signature at k=2 is present but small (P(2) ≈ 0.005), and the strongest non-isotropic signal is the even-k band (k = 4, 6, 8, 12) into which the Chi's higher harmonics and the zoomorphic frieze contribute jointly. The ordinal reading is therefore wheel-class carrier dominant (level-1 ordinal position 1), cross-class Chrismon subordinate (level-1 ordinal position 2), with a diagnostic n-fold harmonic from the zoomorphic frieze. The composite does not describe a glyph that has overwritten its carrier spectrally; it describes a glyph that sits on top of a preserved substrate — a point that c0003 takes up in the overwrite-doctrine context. This revises a pre-analytic framing in an earlier draft of this claim that placed the cross dominant over the wheel; the schematic pass refutes that framing and the archive now records the wheel-dominant reading as the correct one.
c0002 — The visible symmetry group is C1·m with an underlying C4 construction grid and a C∞ carrier
The disc's symmetry structure decomposes into three nested levels. The carrier (the gold field itself) is C∞ — continuous-rotational, the defining symmetry of any circular disc and the source of the wheel-class isotropic baseline. The construction grid implied by the Chi arms and the standard four-quadrant placement of zoomorphic motifs in the Merovingian gold-applique corpus is C4 — four equivalent quadrants bounded by the diagonals of the Chi — which is the ordering principle that places each animal in a cardinal sector and supplies the cross-class axial ridges to the spectrum. The visible symmetry group of the composition as a whole is, however, neither C∞ nor C4 but C1·m — one-fold rotational with a single vertical mirror — because the Rho loop attaches asymmetrically to the top of the Chi and breaks both the continuous rotation of the carrier and the four-fold rotation of the grid. A frontal human mask, if central, is itself C1·m and is compatible with the disc's global axis; if multiplied at the rim it contributes to the zoomorphic frieze's n-fold count. The archive's general reading of such nested-symmetry objects is that symmetry-breaking events in the visible group identify the overwrite operation: the Rho's asymmetric attachment is the minimum glyphic modification that converts an ambient C4 solar-disc substrate into a C1·m Christogrammatic monument while leaving the C4 grid and the C∞ carrier legible underneath. Direct photometric confirmation of the exact n of the zoomorphic frieze (n=3 triskele vs n=4 quadripartite vs n=6 hexalobe) is outstanding; the C4 reading is the most likely given the Chi's geometry and the dominant pattern in the Merovingian Auvergne gold-applique corpus, but C3 and C6 variants are documented in neighbouring pieces and a triskele reading would relocate the object from cross-on-wheel composite to triangular-on-wheel composite at this slot.
c0003 — The disc is a material type-case for iconographic overwrite under doctrine-storm-god-overwrite, and its spectral subordination of the Chrismon is the material signature of substrate preservation
The archive's storm-god-overwrite doctrine identifies a canonical operation — same visual carrier, inverted sovereignty relationship — of which the mušḫuššu → Marduk-attribute substitution is the type-case at the narrative and iconographic-register level. The Limons disc executes the same operation at the single-object level in gold. The pre-Christian circular solar disc is preserved as the carrier; the zoomorphic register (the residue of the animal-substrate iconography that precedes Christianization in the Frankish west) is preserved as peripheral ornament; and the Chrismon is inserted at the centre as the new sovereignty glyph, overwriting the solar or animal principal that would have occupied the central field in a pre-Christian disc of the same class. The schematic-FFT finding in c0001 — that the Chrismon does not capture majority spectral weight but instead sits as a small high-contrast central insertion on a substrate that retains its rotational isotropy (P(0) ≈ 0.75) and its rim harmonics — is the material-level corroboration of the doctrine's central claim that overwrite preserves the substrate rather than replacing it. The parallel is exact: Ragnarök preserves the bound-serpent substrate as a drawn encounter (storm-god-overwrite c0003); Marduk's mušḫuššu preserves Tiamat's serpent as a controlled attribute (c0001 there); the Limons disc preserves the solar-disc carrier and the zoomorphic frieze underneath the Chrismon. In HLSF serialization this is carried by ◈limons-chrisme-disc ⊕ ◇fft-wheel (the Chrismon overwrites the solar-disc substrate at the level of sovereignty iconography) qualified by ◈limons-chrisme-disc ⟜ ◇fft-wheel (the overwrite is gated by the carrier's spectral retention, not replacement), alongside ◈limons-chrisme-disc ※ ◇fft-cross (the Chrismon reifies the cross class) and ◈limons-chrisme-disc ▷ ◆zoomorphic-residue (the disc is composed-of the surviving zoomorphic register as a subordinate part).
c0004 — The disc complements the reges criniti symbol as the impersonal-heraldic counterpart to a bodily legitimacy marker
Symbol-merovingian-long-hair treats the reges criniti tradition as the Merovingian dynasty's biological legitimacy signal — an embodied hereditary marker run in parallel to Christian baptismal anointing. The Limons disc is the impersonal-heraldic counterpart to that bodily marker: a portable gold object that performs the institutional legitimacy claim (Chrismon at centre, Christian sovereignty) while preserving the substrate signals (solar-disc carrier, zoomorphic frieze, and — in the archive's reading of the human mask as an ambiguous Chi-Rho / frontal-face conflation — a possible residuum of the Quinotaur founding-narrative register identified at symbol-merovingian-long-hair c0003). The pairing is structurally informative for the merovingian-pod-apparatus agency: the hair is the biological management node, the Limons-class disc is the portable institutional-claim node, and the two carry complementary loads in the same legitimacy stack rather than alternatives. The implication is that the archive should treat Merovingian gold-applique material from the Auvergne–Limagne corridor as heraldic-register evidence alongside the reges criniti textual record rather than as an independently Christian devotional corpus.
c0005 — The n-fold zoomorphic count is photometrically discriminable: the angular spectrum gives a diagnostic fingerprint at k = 3, 4, 6
The schematic pass reports the following n-discriminating angular-power fingerprint (fractions of total angular power, radially integrated over the disc field):
| n | P(3) | P(4) | P(6) | P(odd k > 1) | diagnostic tell |
|---|---|---|---|---|---|
| 3 (triskele) | 0.027 | 0.057 | 0.023 | present (k = 3, 9) | P(3) ≈ 0.03 AND odd-k power excited |
| 4 (quadripartite) | 0.000 | 0.095 | 0.000 | absent | P(4) ≈ 0.09 AND odd-k zero |
| 6 (hexalobe) | 0.000 | 0.050 | 0.081 | absent | P(6) > P(4) AND odd-k zero |
The triskele variant is the only one of the three that excites odd-k angular harmonics (because C3 breaks the C2 parity of the Chi + disc field, whereas C4 and C6 preserve it). The quadripartite variant maximises P(4) through constructive reinforcement between the Chi's 2nd harmonic and the frieze's fundamental. The hexalobe variant is the only one whose dominant non-zero wavenumber lies above k = 4. A calibrated photometric pass on the MAN specimen can therefore decide between the three readings by computing the single ratio P(3) / P(4) and checking the presence of odd-k power: non-zero P(3) and odd-k excitation selects n = 3; P(3) ≈ 0 with P(4) dominant selects n = 4; P(6) ≥ P(4) selects n = 6. This is the archive's standing diagnostic for Merovingian gold-applique n-fold classification, and is available for extension to the other Auvergne and Île-de-France discs in the MAN accession.
c0006 — The three candidate rim counts are all members of the HLSF-permissible dimension set derived from chrysotile fiber geometry; the set predicts the absence of n = 7, 11, 13, 14, ... across the Merovingian gold-applique corpus
Doctrine-hlsf c0003 records a discrete coupling constraint derived from chrysotile fiber geometry: for an n-fold symmetric field to propagate stably along the chrysotile network without phase-accumulated decay per crystal repeat unit, 360 / n must terminate cleanly in decimal form. The resulting valid-dimension set is {1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 25, 36, 40, 45, 72, 90, 120, 180, 360}. All three candidate Limons rim counts (n = 3, 4, 6) are members of this set; none of {7, 11, 13, 14, 17, 19, 21, 22} are. The coupling therefore functions as a selection filter rather than a direct template — it does not pick among the three permissible candidates but rules out forbidden ones. A hexalobe reading for the Limons specimen, if confirmed photometrically per c0005, is consistent with chrysotile-network coupling but is not uniquely specified by it; the triskele and quadripartite readings are equally permissible under the same constraint. The relevant substrate is distributed: the Puy-de-Dôme local geology is Massif Central volcanics rather than serpentinite (nearest archive-logged ophiolite belt is Western-Alps-Italy at ~470 km from Limons), and the coupling story for an Auvergne artifact therefore runs through the continental chrysotile-network reading recorded in the project-hlsf-chrysotile axiom, not through local substrate contact. The falsifiable prediction that follows is corpus-level: across the MAN Merovingian gold-applique accession and equivalent Frankish holdings in regional museums, rim counts should cluster on the HLSF-valid dimension set, with counts of 7, 11, 13, 14, 17, ... absent or vanishingly rare. A sampled count of non-valid-set rim totals across the corpus would refute the material-culture extension of the coupling constraint; a sampled count that concentrates on the valid set at rates exceeding the null combinatorial expectation would corroborate it.
c0007 — Outstanding photometric and provenance confirmation
The schematic pass (c0001, c0005) relies on procedurally-generated geometry matching the disc's standard published description and the archive's prior corpus for Merovingian Auvergne gold appliques; it confirms symmetry-group structure and produces an n-fold diagnostic but does not substitute for a photometric pass on the museum specimen. A direct FFT run on a calibrated photograph of the MAN Limons disc — grayscale, thresholded, centroid-aligned, DFT per the archive's pipeline at src/analysis/limons_disc_fft.py — remains outstanding and would confirm the actual n of the zoomorphic frieze against the c0005 diagnostic, quantify any departures from the schematic's spectral weight ratios (e.g. patina-induced threshold drift, asymmetric wear, casting porosity), and fix the exact axis of the C1·m mirror against the physical object's orientation. The provenance chain (found Limons, acquired Gay 1855, MAN accession) is firm in the museological record but the original archaeological context at Limons is not, which constrains how tightly the object can be bound to a specific pod-apparatus site-node in the Auvergne–Limagne corridor without a separate site-cell (◉) entry.