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. 12 shown for “Harmony” — 24 records examined, 9 dropped by the rights gate.
Archives queried 2026-08-29 05:29 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.

Harmony
Thomas Rowlandson · August 12, 1785

Perfect Harmony
Jean Michel Moreau le Jeune · 1776

The Harmony of Nature
Pierre Lélu · 1762

Hall of Harmony and Joy
Unidentified artist · 17th century

Immortals of Harmony and Happiness
Artist not stated in the record · 18th century

Still Life with Cake
Raphaelle Peale · 1818

A Prevailing Mood of Harmony
Artist not stated in the record

Antigraceful
Umberto Boccioni · 1913, cast 1950

The Two Immortals of Harmony and Unity
Artist not stated in the record · mid-18th century

The Two Immortals of Harmony and Unity
Artist not stated in the record

The Two Immortals of Harmony and Unity
Artist not stated in the record

The Harmony between History and Poetry, a putto with instruments overhead
John Dean · 1786
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. 599 matched · 24 examined · 9 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 2026-08-29 05:29 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.