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 “Helmet with Aventail” — 64 records examined, 34 dropped by the rights gate.
Archives queried 2026-08-26 22:12 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Helmet with Aventail
Artist not stated in the record · late 15th–16th century
Ohio State Buckeyes football helmet worn by Archie Griffin
Artist not stated in the record · 1972-1975
Helmet
Artist not stated in the record · ca. 1560
Flight helmet worn by Thunderbird pilot Gen. Lloyd W. Newton
Artist not stated in the record · ca. 1974
Helmet
Artist not stated in the record · ca. 1500–1525
Helmets, Swords, Bows and Arrows
Artist not stated in the record · 1780–1830
Helmet
Artist not stated in the record · ca. 1535
Design for Cartouche with Putti Supporting Helmet
François de Cuvilliés the Elder, Belgian, 1695 - 1768 · 1738–45
Helmet
Artist not stated in the record · ca. 1550–1600
Helmet worn by Peter L. Robinson, Sr. during World War I
Artist not stated in the record · ca. 1917
Helmet
Artist not stated in the record · probably 15th century
Combat helmet from World War I used by the 93rd Infantry Division
United States Army, American, founded 1775 · 1914-1918
Helmet
Artist not stated in the record · dated A.H. 977/1588–89 CE
Helmet
Artist not stated in the record · 17th century and later
Helmet
Artist not stated in the record · second half 16th century
Helmet
Artist not stated in the record · dated A.H. 1196/1781–82 CE
Helmet
Artist not stated in the record · early 17th century
Helmet
Artist not stated in the record · late 16th century
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. 1397 matched · 24 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.12 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 249258 matched · 40 examined · 34 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.6 shown
These figures describe the pass run at 2026-08-26 22:12 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.