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. 12 shown for “Christoffer Wilhelm Eckersberg” — 24 records examined, 2 dropped by the rights gate.
Archives queried 2026-08-27 04:26 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.Smithsonian Open Access: HTTP 429 from api.si.edu. Results from the remaining archive are shown unchanged — nothing is substituted for a source that did not answer.
A Section of the Via Sacra, Rome (The Church of Saints Cosmas and Damian)
Christoffer Wilhelm Eckersberg · ca. 1814–15
Valdemar Hjartvar Købke (1813–1893), the Artist's Brother
Christen Købke · ca. 1838
Linear Perspective, Applied to the Art of Painting: A Collection of Studies in Perspective
Christoffer Wilhelm Eckersberg · 1841
Deck of a Warship
Christoffer Wilhelm Eckersberg · ca. 1833
Sailing Vessels at Wilders Plads, Copenhagen
Christoffer Wilhelm Eckersberg · 1830
A couple conversing in a stable yard, with a double rainbow overhead, from 'Linear Perspective, Applied to the Art of Painting'
Christoffer Wilhelm Eckersberg · 1841
Two women conversing on a street corner, from "Linear Perspective, Applied to the Art of Painting"
Christoffer Wilhelm Eckersberg · 1841
View of the Barrière de la Villette in Paris
Christoffer Wilhelm Eckersberg · 1810–13
The Sword of Damocles; verso: Sketches of Man's Head and of a Figure with a Raised Arm
Christoffer Wilhelm Eckersberg · 1805
View of Charlottenborg Palace in Copenhagen with the Old Botanical Garden and Figures
Christoffer Wilhelm Eckersberg · ca. 1838–41
The Harbor of Copenhagen from the Esplanade between Langelinie Park and Toldboden or the Customs House
Christoffer Wilhelm Eckersberg · 1809
A Section of the Via Sacra, Rome (The Church of Saints Cosmas and Damian)
Christoffer Wilhelm Eckersberg · 1814–15
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. 24 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. HTTP 429 from api.si.edu. No records from this archive are shown for this query.Unavailable
These figures describe the pass run at 2026-08-27 04:26 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.