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 “Ugolino da Siena” — 64 records examined, 24 dropped by the rights gate.
Archives queried 2026-08-27 00:27 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
The Last Supper
Ugolino da Siena (Ugolino di Nerio) · ca. 1325
Ugolino in Prison (after Reynolds)
Artist not stated in the record · 1774
Saint Matthew(?)
Ugolino da Siena (Ugolino di Nerio) · late 1320s
Count Ugolino della Gherardesca with his Sons and Grandsons in Prison
Felice Giani, Italian, 1758–1823 · ca. 1800
Madonna and Child
Ugolino da Siena (Ugolino di Nerio) · late 1310s
Ugolino and His Sons
Pietro Bettelini, Italian, 1763–1829 · 1814–1825
The Crucifixion
Ugolino da Siena · ca. 1315–20
Death of Count Ugolino and his Sons
Felice Giani, Italian, 1758–1823 · 1815–1823
Engaged molding on a polyptych panel
Siena · ca. 1345
Study for "Ugolino and His Sons"
Jean-Baptiste Carpeaux, French, b. Valenciennes, 1827–1875 · (1857-1860)/cast before 1921
Madonna and Child
Duccio di Buoninsegna · ca. 1290–1300
Drawing
Felice Giani, Italian, 1758–1823
Saint Catherine of Siena Exchanging Her Heart with Christ
Giovanni di Paolo (Giovanni di Paolo di Grazia)
Study of Siena Cathedral
Walter Shirlaw, American, b. Scotland, 1838–1909 · ca. 1872
The Creation of the World and the Expulsion from Paradise
Giovanni di Paolo (Giovanni di Paolo di Grazia) · 1445
Palazzo Pubblico, Siena
Walter Shirlaw, American, b. Scotland, 1838–1909 · ca. 1872
Paradise
Giovanni di Paolo (Giovanni di Paolo di Grazia) · 1445
Study of Basin, Siena Cathedral
Walter Shirlaw, American, b. Scotland, 1838–1909 · ca. 1872
Saint Anthony the Abbot in the Wilderness
Sano di Pietro (Ansano di Pietro di Mencio) · ca. 1440
Study of Siena Cathedral
Walter Shirlaw, American, b. Scotland, 1838–1909 · ca. 1872
Madonna and Child with Saints
Giovanni di Paolo (Giovanni di Paolo di Grazia) · 1454
Lower Part of the Choir, Siena Cathedral
Walter Shirlaw, American, b. Scotland, 1838–1909 · ca. 1872
The Journey of the Magi
Sassetta (Stefano di Giovanni) · ca. 1433–35
Drawing
Felice Giani, Italian, 1758–1823
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. 170 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. 61851 matched · 40 examined · 23 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 2026-08-27 00:27 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.