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 “Incomplete project for the elevation of an altar” — 64 records examined, 2 dropped by the rights gate.
Archives queried 2026-09-03 20:33 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 Crucifixion
Master of the Berswordt Altar · ca. 1400
Incomplete project for the elevation of an altar
Artist not stated in the record · 1740–1770
The Flagellation
Master of the Berswordt Altar · ca. 1400
Project for the elevation of an altar
Artist not stated in the record · 1750–1780
The Harvesters
Pieter Bruegel the Elder · 1565
Project for an Altar
Artist not stated in the record · 1750–1775
The Adoration of the Magi
Joos van Wassenhove · 1472–74
Project for an Altar
Artist not stated in the record · 1725–1750
Chair (Sgabello)
Workshop of Giuliano da Maiano (1432–1490) and Benedetto da Maiano (1442–1497) · ca. 1489–91
Design for an Altar
Artist not stated in the record · 1733
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
Project for an altar: intended to be executed with colored marble and gilded bronze
Artist not stated in the record · 1780–1800
The Glorification of the Barbaro Family
Giovanni Battista Tiepolo · ca. 1750
Design for the Elevation of an Altar
Artist not stated in the record · 1550–80
Madonna and Child Enthroned with Two Angels
Fra Filippo Lippi · ca. 1440
Design for an Altar
Filippo Marchionni, Italian, 1732–1805 · ca. 1780–90
The Annunciation
Hans Memling · 1480–89
Project for an altar of the Annunciation for S. Antonio dell'Ospedale in Anagni
Giuseppe Subleyras, Italian, 1745 – 1819 · 1780
Saint Anthony the Abbot in the Wilderness
Sano di Pietro (Ansano di Pietro di Mencio) · ca. 1440
Project: The elevation of an altar
Artist not stated in the record · 1575–1600
Virgin and Child with a Donor Presented by Saint Jerome
Master of the Munich Marian Panels · ca. 1450
Project for an altar with alternative suggestions
Artist not stated in the record · 1775–1780
Battle between Christians and Muslims at El Sotillo
Francisco de Zurbarán · ca. 1637–39
Design for an Altar: Elevation, with Trompe l'Oeil Plan Below
Carlo Marchionni, Italian, 1702–1786 · 1750–75
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. 180 matched · 24 examined · 2 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. 4170859 matched · 40 examined · 0 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 20:33 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.