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 “Carlo Zucchi the Younger” — 64 records examined, 27 dropped by the rights gate.
Archives queried 2026-09-03 13:57 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Design for an Opera Set, a Congress of Cupids
Carlo Zucchi the Younger · 18th century

Side Wall Elevation of the Riding Academy, Vienna
Artist not stated in the record · 1740–44

Design for a Stage Set
Carlo Zucchi the Younger · ca. 1748–95

Section of the House and Proscenium
Saverio Avesani, Italian, b. 1690 · ca. 1720

Madonna and Child
Carlo Crivelli · ca. 1480

Exterior, Teatro Filarmonico, Verona
Francesco Galli Bibiena, Italian, 1659–1739 · 1731

The Dormition of the Virgin
Carlo Saraceni · ca. 1612

Transverse Section, Proscenium, and Curtain, Teatro Filarmonico, Verona
Francesco Galli Bibiena, Italian, 1659–1739 · 1731

The Harvesters
Pieter Bruegel the Elder · 1565

Little Crow the Younger
Joel Emmons Whitney, 19 May 1822 - 1886 · 1862

Equestrian Portrait of Cornelis (1639–1680) and Michiel Pompe van Meerdervoort (1638–1653) with Their Tutor and Coachman
Aelbert Cuyp · ca. 1652–53

Portrait of Thomas Gatchell the Younger
Unidentified (British) · ca. 1845

Salisbury Cathedral from the Bishop's Grounds
John Constable · ca. 1825

Pash-ee-pa-hó, Little Stabbing Chief, the Younger, One of Black Hawk's Braves
George Catlin, born Wilkes-Barre, PA 1796-died Jersey City, NJ 1872 · 1832

The Triumph of Fame; (reverse) Impresa of the Medici Family and Arms of the Medici and Tornabuoni Families
Giovanni di ser Giovanni Guidi (called Scheggia) · ca. 1449

Album of Architectural Prints
François de Cuvilliés the younger, German, 1731 - 1777 · ca. 1770

Monsignor Giuseppe Spina (1756–1828)
Angelica Kauffmann · 1798

Young Ma Has Kah
Unidentified Artist · 1838

Assumption of the Virgin (after Carlo Maratta?)
Ercole Procaccini The Younger · 17th century

Designs for Capitals
François de Cuvilliés the younger, German, 1731 - 1777 · 1731–77

Wall painting from Room H of the Villa of P. Fannius Synistor at Boscoreale
Artist not stated in the record · ca. 50–40 BCE

Les Plans de Falquensloust
François de Cuvilliés the younger, German, 1731 - 1777 · 1770

Saint Jerome in the Wilderness
Antonio Rossellino · ca. 1470

Fontaine executé dans une Niche de Charmille
François de Cuvilliés the younger, German, 1731 - 1777 · 1770
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. 61 matched · 24 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. 1208223 matched · 40 examined · 27 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 2026-09-03 13:57 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.