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. 16 shown for “Head of Emperor Constans (r. 337–50)” — 64 records examined, 36 dropped by the rights gate.
Archives queried 2026-09-03 13:38 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Head of Emperor Constans (r. 337–50)
Artist not stated in the record · ca. 337–40
1 Solidus, Byzantine Empire, 659 - 668
Constans II Emperor of Byzantium · 659 - 668
Bronze statue of the emperor Trebonianus Gallus
Artist not stated in the record · 251–253 CE
Portrait of Emperor Charles V (1500-1558)
Artist not stated in the record · ca. 1580-1600
Marble portrait of the emperor Augustus
Artist not stated in the record · ca. 14–37 CE
A Roman Emperor Meeting a Soldier
Artist not stated in the record · ca. 1520
Marble portrait bust of the emperor Gaius, known as Caligula
Artist not stated in the record · 37–41 CE
Emperor Napoleon III
Artist not stated in the record · ca. 1870
Gold Solidus of Constans II (641–68)
Artist not stated in the record · 654–659
Marble portrait head of the Emperor Constantine I
Artist not stated in the record · ca. 325–370 CE
Marble portrait of the emperor Caracalla
Artist not stated in the record · 212–217 CE
Double-Barreled Wheellock Pistol Made for Emperor Charles V (reigned 1519–56)
Peter Peck · ca. 1540–45
Bronze portrait head of the emperor Gaius (Caligula)
Artist not stated in the record · ca. 37–41 CE
Colossal marble head of the emperor Augustus
Artist not stated in the record · ca. 14–30 CE
Marble portrait of the emperor Antoninus Pius
Artist not stated in the record · ca. 138–161 CE
Marble portrait of the co-emperor Lucius Verus
Artist not stated in the record · 161–169 CE
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. 200 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. 2881770 matched · 40 examined · 36 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.4 shown
These figures describe the pass run at 2026-09-03 13:38 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.