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. 19 shown for “Close Helmet” — 64 records examined, 33 dropped by the rights gate.
Archives queried 2026-08-26 19:55 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Close Helmet
Hans Maystetter · ca. 1505–10
Textile
Artist not stated in the record · late 17th century–early 18th century
Close Helmet
Artist not stated in the record · ca. 1550
Camera, Leica, Spectrographic, 35mm, Glenn, Friendship 7
Leica
Close Helmet
Artist not stated in the record · ca. 1575
![Erminia and the Shepherd [above]; Atalanta hunting the Calydonian Boar [below], by Jan van der Straet, called Stradanus, Flemish, 1523–1605](/_next/image?url=https%3A%2F%2Fids.si.edu%2Fids%2Fdownload%3Fid%3DCHSDM-7785_06-000001.jpg&w=3840&q=75)
Erminia and the Shepherd [above]; Atalanta hunting the Calydonian Boar [below]
Jan van der Straet, called Stradanus, Flemish, 1523–1605 · ca. 1596 – 1600
Helmet
Artist not stated in the record · ca. 1560
Helmet mask
Mende artist · Mid-20th century
Close Helmet
Gian Giacomo Negroli · ca. 1510–20
German Alergians captured by 92nd Div - St Die, Vosges Sept 14, 1918
Artist not stated in the record · September 14, 1918
Close Helmet
Pompeo della Cesa · ca. 1585
Henry Frederick, Prince of Wales
Unidentified Artist · 1616-1622
Close Helmet
Giovan Paolo Negroli · ca. 1540–45
John Talbot, 1st Earl of Shrewsbury
Thomas Cecill, active 1626-1640 · 1625-1632
Close Helmet
Wolfgang Grosschedel · ca. 1560
Close Helmet for the Tourney
Daniel Hopfer · dated 1552
Close Helmet for Foot Combat
Artist not stated in the record · ca. 1600
Close Helmet of Claude Gouffier (1501–1570)
Artist not stated in the record · ca. 1555–60
Close Helmet for a Cuirassier
Artist not stated in the record · ca. 1615–20
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. 234 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. 16064 matched · 40 examined · 33 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.7 shown
These figures describe the pass run at 2026-08-26 19:55 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.