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 “Rudolph Ackermann, London” — 64 records examined, 5 dropped by the rights gate.
Archives queried 2026-08-26 20:21 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
The Repository of Arts, Literature, Fashions, Manufactuers, &c., 2nd series, volume 12
Rudolph Ackermann, London · July–December 1821
Half Morning - Walking Dress
Ackermann’s, London, England · 1819
The Repository of Arts, Literature, Fashions &c., 3rd series, volume 6
Rudolph Ackermann, London · July–December 1825
Morning Dress
Ackermann’s, London, England · 1819
The Repository of Arts, Literature, Fashions, Manufactuers, &c., 2nd series, volume 11
Rudolph Ackermann, London · January–June 1821
Walking and Morning Dress
Ackermann’s, London, England · 1819
The Repository of Arts, Literature, Commerce, Manufactures, Fashions, and Politics
Rudolph Ackermann, London · 1809–28
Walking Dress
Rudolph Ackermann, English, b. Germany, 1764–1834 · 1819
Four Rows of Musicians and Dancers
Rudolph Ackermann, London · 1817
Opera Dress
Rudolph Ackermann, English, b. Germany, 1764–1834 · 1811
The Devil's Darling: Text
Rudolph Ackermann, London · March 12, 1814
Walking Dress
Rudolph Ackermann, English, b. Germany, 1764–1834 · 1819
Promenade Dress
Rudolph Ackermann, English, b. Germany, 1764–1834 · 1811
The Repository of Arts, Literature, Commerce, Manufactures, Fashions, and Politics, 1st series, vol. 1
Rudolph Ackermann, London · January–June 1809
Carriage Dress
Rudolph Ackermann, English, b. Germany, 1764–1834 · 1811
On Painting in Oil and Water Colours, Landscape and Portraits . . .
Theodore Henry Adolphus Fielding · 1839
Walking Dress
Rudolph Ackermann, English, b. Germany, 1764–1834 · 1819
View of Oxford Castle
Thomas Rowlandson · 1809
Half Dress
Rudolph Ackermann, English, b. Germany, 1764–1834 · 1816
View of the Theatre, Printing House &c. Oxford
Thomas Rowlandson · 1810
Evening Dress
Rudolph Ackermann, English, b. Germany, 1764–1834 · 1819
View of the Theatre, Printing House &c. Oxford
Thomas Rowlandson · 1810
Evening Dress
Rudolph Ackermann, English, b. Germany, 1764–1834 · 1810
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. 915 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. 13862 matched · 40 examined · 5 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 2026-08-26 20:21 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.