Two 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 “Charles Clifford” — 64 records examined, 22 dropped by the rights gate.
Archives queried 2026-08-28 18:42 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Portal of the Convent of Sancti Spiritu, Salamanca
Charles Clifford · 1853

St. Mary's Church, Huntingdon
Ernest Clifford Peixotto, American, 1869–1940 · 1899
![[Puente del Diable, Martorell], by Charles Clifford](/_next/image?url=https%3A%2F%2Fimages.metmuseum.org%2FCRDImages%2Fph%2Fweb-large%2FDT6029.jpg&w=3840&q=75)
[Puente del Diable, Martorell]
Charles Clifford · ca. 1856

Interior of Westminster Hall
Ernest Clifford Peixotto, American, 1869–1940 · 1899

Armor Garniture of George Clifford (1558–1605), Third Earl of Cumberland
Jacob Halder · 1586

Pembroke Castle
Ernest Clifford Peixotto, American, 1869–1940 · 1899

Zaragoza: Porta de los Gigantes
Charles Clifford · 1860

Exterior of Westminster Hall
Ernest Clifford Peixotto, American, 1869–1940 · 1899
![[The Lion Court at the Alhambra, Viewed from Beneath the Portico Temple], by Charles Clifford](/_next/image?url=https%3A%2F%2Fimages.metmuseum.org%2FCRDImages%2Fph%2Fweb-large%2FDP163228.jpg&w=3840&q=75)
[The Lion Court at the Alhambra, Viewed from Beneath the Portico Temple]
Charles Clifford · 1862

St. John's Gate, Bristol
Ernest Clifford Peixotto, American, 1869–1940 · 1899
![[Madrid. Facade of the Hospital of "La Latina"], by Charles Clifford](/_next/image?url=https%3A%2F%2Fimages.metmuseum.org%2FCRDImages%2Fph%2Fweb-large%2FDT6340.jpg&w=3840&q=75)
[Madrid. Facade of the Hospital of "La Latina"]
Charles Clifford · ca. 1857

The West Gate, Winchester
Ernest Clifford Peixotto, American, 1869–1940 · 1899

Principal Doorway of the Carthusian Monastery, Burgos
Charles Clifford · 1853

The Castle of Carlisle
Ernest Clifford Peixotto, American, 1869–1940 · 1899

Monserrat, Vista general de la montaña desde Monistrol
Charles Clifford · 1860

St. James's Palace
Ernest Clifford Peixotto, American, 1869–1940 · 1899

Baleares, Aldeanos de Palma y sus alrrededores
Charles Clifford · 1860

The Cromwell Barn, St. Ives
Ernest Clifford Peixotto, American, 1869–1940 · 1899
![[Cloisters of the Church of Saint John of the Kings, Toledo, Spain], by Charles Clifford](/_next/image?url=https%3A%2F%2Fimages.metmuseum.org%2FCRDImages%2Fph%2Fweb-large%2FDT6339.jpg&w=3840&q=75)
[Cloisters of the Church of Saint John of the Kings, Toledo, Spain]
Charles Clifford · ca. 1858

The Banqueting Hall, Whitehall, London
Ernest Clifford Peixotto, American, 1869–1940 · 1899

Zaragoza, Patio de la Casa Conocida con el Nombre de los Infantes
Charles Clifford · 1860

The Castle of Launceston
Ernest Clifford Peixotto, American, 1869–1940 · 1899

The Walnut Tree of Emperor Charles V, Yuste
Charles Clifford · 1858

Durham
Ernest Clifford Peixotto, American, 1869–1940 · 1899
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. 55 matched · 24 examined · 1 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. 132388 matched · 40 examined · 21 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 2026-08-28 18:42 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.