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. 24 shown for “Adam Ludwig d'Argent” — 64 records examined, 28 dropped by the rights gate.
Archives queried 2026-09-06 11:18 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Joseph II (1741–1790), Emperor of Austria
Adam Ludwig d'Argent · ca. 1780
Ardisia elegans Andrews
Artist not stated in the record · May 1931
Clariophone
Gebr. Ludwig (?) · ca. 1900
Badula insularis A. DC.
Artist not stated in the record · 12 Aug 1994
Harlequin
Höchst Manufactory · ca. 1750–53
Oplismenus hirtellus (L.) P. Beauv.
Artist not stated in the record · 9 Feb 2011
Vase with cover
Höchst Manufactory · 1749–58
Design for Pulpit
Artist not stated in the record · ca. 1670
The Holy Family
Joos van Cleve · ca. 1512–13
Guapira eggersiana (Heimerl) Lundell
Artist not stated in the record · 9 Feb 2011
Expulsion from Paradise
Hans Baldung (called Hans Baldung Grien) · 1514
Betula gracilis ? Ludwig
Artist not stated in the record
Bowl
Meissen Manufactory · ca. 1735
Carl Ludwig Fernow
Artist not stated in the record
Dead Christ Supported by Angels
Francesco Trevisani · ca. 1710
Ludwig Mueller
Samuel Johnson Woolf, 12 Feb 1880 - 3 Dec 1948 · c. 1935
Benedikt von Hertenstein (born about 1495, died 1522)
Hans Holbein the Younger · 1517
Physcomitrium sphaericum (Ludwig) Brid.
Artist not stated in the record
The Dormition of the Virgin
Carlo Saraceni · ca. 1612
Physcomitrium sphaericum (Ludwig) Brid.
Artist not stated in the record
Landscape with a figure seated on a rock
Salvator Rosa · ca. 1640
Physcomitrium sphaericum (Ludwig) Brid.
Artist not stated in the record
Saint John on Patmos
Martin Schongauer · 1470–1491
Physcomitrium sphaericum (Ludwig) Brid.
Artist not stated in the record
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. 52 matched · 24 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. 17238 matched · 40 examined · 25 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.12 shown
These figures describe the pass run at 2026-09-06 11:18 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.