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 “Carl Ludwig Frommel” — 64 records examined, 35 dropped by the rights gate.
Archives queried 2026-09-06 14:51 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
A View of Rome from the Palatine
Carl Ludwig Frommel · 1813–17 (?)
Carl Ludwig Fernow
Artist not stated in the record
Landscape Near Tivoli
Carl Ludwig Frommel · 1800–1863
Rubus gracilis Roxb.
Artist not stated in the record · Transcribed d/m/y: 23/7/97
The Cemetery at Pronoia near Nauplia
Carl Rottmann · ca. 1841–47
Betula gracilis ? Ludwig
Artist not stated in the record
Harlequin
Höchst Manufactory · ca. 1750–53
Ludwig Mueller
Samuel Johnson Woolf, 12 Feb 1880 - 3 Dec 1948 · c. 1935
Landscape near Albano and Pallazole
Joseph Rebell · 1812
Physcomitrium sphaericum (Ludwig) Brid.
Artist not stated in the record
Carl Ernst Christoph Hess
Ludwig Emil Grimm
Physcomitrium sphaericum (Ludwig) Brid.
Artist not stated in the record
Grand Piano
Carl Bechstein · ca. 1893
Physcomitrium sphaericum (Ludwig) Brid.
Artist not stated in the record
Household Stories from the Collection of the Brothers Grimm
Jacob Ludwig Carl Grimm · 1882
Portrait of Maria Theresia, Queen of Saxony
Ludwig Theodor Zöllner · 1829
Saint Elizabeth Carrying Her First-born Son to the Church
Ludwig Emil Grimm · ca. 1850
Christenfreude in Lied und Bild
Adrian Ludwig Richter · 1855
Portrait of Maria Theresia, Queen of Saxony
Ludwig Theodor Zöllner · after 1829
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. 74 matched · 24 examined · 2 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. 42535 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 2026-09-06 14:51 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.