OpenTwo archives, queried live.
Every record below comes from The Met or Smithsonian Open Access and was filtered on that archive’s own rights field before it reached this page. 18 shown for “Limestone altar or pedestal with coiled snake” — 47 records examined, 3 dropped by the rights gate.
Archives queried 2026-08-28 05:05 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Limestone altar or pedestal with coiled snake
Artist not stated in the record · 5th century BCE
Ornamental Vase Design
François Boucher, French, 1703–1770 · ca. 1738
Altar
Artist not stated in the record · ca. 232
intermediate panel
Arthur & Robert · ca. 1790
Whistling vessel
Maya artist(s) · 400–500 CE
Sidewall
Arthur & Robert · ca. 1790
Oedipus and the Sphinx
Gustave Moreau · 1864
Ornamental Vase Design
François Boucher, French, 1703–1770 · 1738–72
Top fragment of a kudurru with a mushhushshu dragon and divine symbols
Artist not stated in the record · ca. 1156–1025 BCE
Design for an Altar
Gilles-Marie Oppenord, French, 1672–1742 · 1749-1761
Deity figure
Maya artist(s) · 200–600 CE
Design for a Main Altar
Giuseppe Barberi, Italian, 1746–1809 · 1746-1809
Two Designs for Altar Cross Bases; verso, Designs for Five Projects
Luzio Romano, Italian, active 1528 – 1575 · 1530–40
Design for a Candlestick
Michelangelo Buonarroti, Italian, 1475–1564 · 1520–30
Ceiling of Cabinet dedicated to Peace, Palazzo Quirinale, Rome
Felice Giani, Italian, 1758–1823 · 1812
Design for an Altar
Artist not stated in the record · 1700–57
An Altar Over a Crypt
Giuseppe Valadier, Italian, 1762–1839 · 1775
Sidewall
Artist not stated in the record · 1890–1900
Where these records came from.
Two archives are wired, and only two. Each one is filtered on its own rights field — never on a title match, and never on the presence of an image file.
- The Met Collection API (Open Access)Rights field:
isPublicDomain. 7 matched · 7 examined · 1 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.6 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 467579 matched · 40 examined · 2 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.12 shown
These figures describe the pass run at 2026-08-28 05:05 UTC, during this request. A completed pass is kept for 24 hours and replayed for an identical search, which is what keeps repeated queries inside Smithsonian’s 30-requests-per-hour allowance. A pass in which either archive failed to answer is never kept — an outage must not be replayed as though it were a finding about the catalogue.
Wikimedia Commons and the Library of Congress are deliberately not wired. Wikimedia was confirmed, on a live query, to return CC-BY material inside the same result set as genuine public domain works, and filtering it safely has not been designed yet. loc.gov was blocked by bot detection during the source evaluation, so its rights vocabulary has never been observed — and nothing here is built on a field nobody has read.
An image file is a rights claim. It never travels without its field.