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 “Doorknocker” — 32 records examined, 2 dropped by the rights gate.
Archives queried 2026-08-28 13:48 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Doorknocker
Artist not stated in the record · late 16th century or later
Project for a Doorknocker
Artist not stated in the record · 18th century
Doorknocker
Artist not stated in the record · late 15th–early 16th century
Project for a Doorknocker
Artist not stated in the record · 18th century
Doorknocker with a Triton and a Nereid
Artist not stated in the record · late 16th century
Designs for two doorknockers
Richard de Lalonde, French, active 1780–96 · ca. 1780
Doorknocker with Prudence and Fortitude joined eternally
Artist not stated in the record · mid-16th century
Heurtoirs à Boucles
Richard de Lalonde, French, active 1780–96 · 1775-1788
Stirrup
Artist not stated in the record · late 15th century
Heurtoirs à Boucles
Richard de Lalonde, French, active 1780–96 · 1775-1788
Design for a Door-Knocker (?) With Two Nymphs
Giacomo Rossi · 18th century
Heurtoirs à Boucles
Richard de Lalonde, French, active 1780–96 · 1775-1788
Dinar of Tughril (r. 1040–63)
Artist not stated in the record · dated 444 AH/1052–53 CE
Heurtoirs à Boucles
Richard de Lalonde, French, active 1780–96 · 1775-1788
Candlestick Base with Interlacing Dragons
Artist not stated in the record · early to mid-13th century
Heurtoirs et Boutons
Richard de Lalonde, French, active 1780–96 · 1775-1788
Pluto and Cerberus
Tiziano Aspetti · ca. 1588
Heurtoirs et Boutons
Richard de Lalonde, French, active 1780–96 · 1775-1788
Textile Fragment with Double-Headed Eagles and Facing Lions
Artist not stated in the record · 13th century
Project for a doorknocker
Artist not stated in the record · 18th century
Bowl with cover (perfume burner)
Angelo de' Rossi · 1599
Designs for two doorknockers
Richard de Lalonde, French, active 1780–96 · ca. 1780
Hexagonal Tile Ensemble with Sphinx
Artist not stated in the record · ca. 1160s–70s
Door Knocker and Metal Purse Frames
Giuseppe Barberi, Italian, 1746–1809 · ca. 1780
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. 13 matched · 13 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. 19 matched · 19 examined · 1 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 13:48 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.