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. 23 shown for “Hieron” — 57 records examined, 32 dropped by the rights gate.
Archives queried 2026-08-27 06:11 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Terracotta kylix (drinking cup)
Hieron · ca. 480 BCE
Asplenium sellowianum (Hieron.) C. Presl ex Hieron.
Artist not stated in the record · 23 Nov 1937
Terracotta kylix (drinking cup)
Hieron · ca. 480 BCE
Asplenium sellowianum (Hieron.) C. Presl ex Hieron.
Artist not stated in the record · Oct 1877
Terracotta kylix (drinking cup)
Hieron · ca. 480 BCE
Asplenium sellowianum (Hieron.) C. Presl ex Hieron.
Artist not stated in the record
Terracotta fragment of a kylix (drinking cup)
Hieron · 500–480 BCE
Asplenium sellowianum (Hieron.) C. Presl ex Hieron.
Artist not stated in the record · 19 Mar 1924
Drachm, Hieron of Syracuse, 470 B.C., from the Ancient Coins series (N180) issued by Wm. S. Kimball & Co.
William S. Kimball & Company · 1888
Diplostephium cochense Hieron.
Artist not stated in the record
Terracotta fragment of a kylix (drinking cup)
Makron · 500–480 BCE
Asplenium sellowianum (Hieron.) C. Presl ex Hieron.
Artist not stated in the record · Jan 1941
Terracotta fragment of a kylix (drinking cup)
Makron · 500–480 BCE
Asplenium sellowianum (Hieron.) C. Presl ex Hieron.
Artist not stated in the record · 18 Apr 1940
Terracotta fragment of a kylix (drinking cup)
Makron · 500–480 BCE
Selaginella eschscholzii Hieron.
Artist not stated in the record · Mar 1907
Terracotta fragment of a kylix (drinking cup)
Artist not stated in the record · 500–480 BCE
Aspidium montevidense f. squamulosum Hieron.
Artist not stated in the record · 5 Feb 1877
Terracotta fragment of a kylix (drinking cup)
Makron · 500–480 BCE
Senecio mojandensis Hieron.
Artist not stated in the record
Terracotta fragment of a kylix (drinking cup)
Makron · 500–480 BCE
Palhinhaea trianae (Hieron.) Holub
Artist not stated in the record
Terracotta fragment of a kylix (drinking cup)
Artist not stated in the record · 500–480 BCE
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. 17 matched · 17 examined · 3 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. 11478 matched · 40 examined · 29 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.11 shown
These figures describe the pass run at 2026-08-27 06:11 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.