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. 12 shown for “Etienne DuPérac” — 24 records examined, 0 dropped by the rights gate.
Archives queried 2026-09-06 04:04 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.
Naval engagement set inside a Roman arena, with the river Tiber and nymphs at lower left and right
Etienne DuPérac · 1577–85
Longitudinal Section Showing the Interior of Saint Peter's Basilica as Conceived by Michelangelo (published in 1569), from "Speculum Romanae Magnificentiae"
Etienne DuPérac · 1551, 1558–61
Elevation Showing the Exterior of Saint Peter's Basilica from the South as Conceived by Michelangelo (published in 1569), from "Speculum Romanae Magnificentiae"
Etienne DuPérac · 1558–61
Plan of St. Peter's, from "Speculum Romanae Magnificentiae"
Etienne DuPérac · 1569
View of the Campidoglio as re-designed by Michelangelo, from "Speculum Romanae Magnificentiae"
Etienne DuPérac · 1569
View of the Roman Capitol, from "Speculum Romanae Magnificentiae"
Etienne DuPérac · 1569
Temples on the Isle of Tiber, from "Speculum Romanae Magnificentiae"
Etienne DuPérac · 1582
Sepulchre of Augustus, from "Speculum Romanae Magnificentiae"
Etienne DuPérac · 1575
Marriage of Annibale Altemps and Ortensia Borromeo, Rome, March 5, 1565, from "Speculum Romanae Magnificentiae"
Etienne DuPérac · 1565
Plan of St. Peter's, from "Speculum Romanae Magnificentiae"
Etienne DuPérac · 1569
Sepulchre of Augustus, from "Speculum Romanae Magnificentiae"
Etienne DuPérac · 1575
St. Peter's, from "Speculum Romanae Magnificentiae"
Etienne DuPérac · 16th century
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. 35 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. HTTP 429 from api.si.edu. No records from this archive are shown for this query.Unavailable
These figures describe the pass run at 2026-09-06 04:04 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.