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 “Ferdinand Anton Krüger” — 22 records examined, 0 dropped by the rights gate.
Archives queried 2026-08-28 09:28 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.
Tobias Takes Leave of his Father
Ferdinand Anton Krüger · 1829
Heroic Landscape with Rainbow
Joseph Anton Koch · 1824
Madonna and Child Enthroned with Saints
Raphael (Raffaello Sanzio or Santi) · ca. 1504
Portrait of Cardinal Infante Ferdinand of Austria
Anton Joseph von Prenner · 1728
Portrait of Cardinal Infante Ferdinand of Austria
Anton Joseph von Prenner · 1728
Portrait of Cardinal-Infante Ferdinand of Austria, on horseback
Anton van der Does · ca. 1630–54
Seated Old Man Holding a Pipe
Anton Crussens · mid-17th century
Old Man Facing Left, Wearing Glasses and Threading a Needle
Anton Crussens · mid-17th century
Seated Old Man Facing Right, Singing and Holding Music
Anton Crussens · mid-17th century
Fish Construction in Honor of the Entry of Cardinal-Infante Ferdinand into Ghent in 1635
Anton van der Does · 1636
Plate 6: Ferdinand receiving the keys to the city of Ghent; from Guillielmus Becanus's 'Serenissimi Principis Ferdinandi, Hispaniarum Infantis...'
Pieter de Jode II · 1636
Marriage of Archduchess Maria Amalia with Ferdinand, Duke of Parma
Anton Franz Widemann · 1769
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. 22 matched · 22 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. HTTP 429 from api.si.edu. No records from this archive are shown for this query.Unavailable
These figures describe the pass run at 2026-08-28 09:28 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.