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. 24 shown for “Freemason's Hall, from "Ackermann's Repository"” — 62 records examined, 2 dropped by the rights gate.
Archives queried 2026-09-04 07:55 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Freemasons' Hall, Great Queen Street
Thomas Rowlandson · October 1, 1808
Freemason's Hall, from "Ackermann's Repository"
Artist not stated in the record · 1808
Freemasons' Hall, Great Queen Street
Thomas Rowlandson · October 1, 1808
Westminster Hall, from "Ackermann's Repository"
Artist not stated in the record · 1809
Egyptian Hall, Mansion House
Thomas Rowlandson · January 1, 1809
The Hall, Blue Coat School, from "Ackermann's Repository"
Artist not stated in the record · 1808
Dining Hall, Asylum
Thomas Rowlandson · February 1, 1808
Egyptian Hall, Mansion House, from "Ackermann's Repository"
Artist not stated in the record · 1809
The Hall, Blue Coat School
Thomas Rowlandson · March 1, 1808
Session House, Clerkenwell, from "Ackermann's Repository"
Artist not stated in the record · 1809
The Great Hall, Bank of England
Thomas Rowlandson · February 1, 1808
The Great Hall, Bank of England, from "Ackermann's Repository"
Artist not stated in the record · 1808
View of the Tower
Thomas Rowlandson · October 1, 1809
Dining Hall, Asylum, from "Ackermann's Repository"
Artist not stated in the record · 1808
Greenwich Hospital, The Painted Hall
Thomas Rowlandson · January 1, 1810
Heralds College, The Hall, from "Ackermann's Repository"
Artist not stated in the record · 1808
South Sea House, Dividend Hall
Thomas Rowlandson · February 1, 1810
Leaden Hall Market, from "Ackermann's Repository"
Artist not stated in the record · 1809
Court of Kings Bench, Westminster Hall
Thomas Rowlandson · 1808
South Sea House Dividend Hall, from "Ackermann's Repository"
Artist not stated in the record · 1810
Court of Exchequer, Westminster Hall
Thomas Rowlandson · 1808
The Hall and Staircase, British Museum, from "Ackermann's Repository"
Artist not stated in the record · 1808
Court of Common Pleas, Westminster Hall
Thomas Rowlandson · June 1, 1808
View of Westminster Hall and Bridge, from "Ackermann's Repository"
Artist not stated in the record · 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. 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. 436637 matched · 40 examined · 2 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 2026-09-04 07:55 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.