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. 13 shown for “Constantine IV Emperor of Byzantium” — 64 records examined, 39 dropped by the rights gate.
Archives queried 2026-09-03 11:29 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Marble portrait head of the Emperor Constantine I
Artist not stated in the record · ca. 325–370 CE
1 Solidus, Byzantine Empire, 668 - 680
Constantine IV Emperor of Byzantium · 668 - 680
Plaque with Christ Receiving Magdeburg Cathedral from Emperor Otto I
Artist not stated in the record · ca. 962–968
Cassone with painted front panel depicting the Conquest of Trebizond
Apollonio di Giovanni di Tomaso · after ca. 1461
Book of the Gospels
Northern Highlands artist · late 14th–early 15th century
Head of Emperor Constans (r. 337–50)
Artist not stated in the record · ca. 337–40
The Fieschi Morgan Staurotheke
Artist not stated in the record · early 9th century
Solidus of Heraclius, Heraclius Constantine, and Heraclonas
Artist not stated in the record · 638–641
Ewer of Zenobius
Artist not stated in the record · 700s
The Coronation of the Virgin, and Saints
Giovanni di Tano Fei · 1394
Goblet with Personifications of Cyprus, Rome, Constantinople, and Alexandria
Artist not stated in the record · 700s
Pectoral with Coins and Pseudo-Medallion
Artist not stated in the record · ca. 539–50
Plate with the Presentation of David to Saul
Artist not stated in the record · 629–630
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. 38 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. 2862376 matched · 40 examined · 39 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.1 shown
These figures describe the pass run at 2026-09-03 11:29 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.