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 “Carl August Richter” — 64 records examined, 27 dropped by the rights gate.
Archives queried 2026-09-06 05:24 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Landscape in Saxony
Carl August Richter · late 18th–19th century
Letter from US Senator Phil Gramm to Carl Lewis
Artist not stated in the record · August 1, 1996
Gothic Windows in the Ruins of the Monastery at Oybin
Carl Gustav Carus · ca. 1828
Letter from US Representative Kenneth E. Bentsen, Jr. to Carl Lewis
Artist not stated in the record · August 14, 1996
Saint Roch
Francesco Francia · 1502
Letter from US Representative Tom DeLay to Carl Lewis
Artist not stated in the record · August 27, 1996
Schloss Milkel in Moonlight
Carl Gustav Carus · ca. 1833–35
Merismopedia affixum P. Richter in Hauck & P. Richter
Artist not stated in the record
Grand Piano
Ferdinand Hofmann · ca. 1790
Chroococcus obliteratus P. Richter in Hauck & P. Richter
Artist not stated in the record · Sep 1885
Richter's Werke (binder's title)
Adrian Ludwig Richter · 1879
Aphanothece conferta P. Richter in Hauck & P. Richter
Artist not stated in the record · Feb 1892
Vater Unser in Bildern
Adrian Ludwig Richter · ca. 1856
Hydrocoleum hieronymii P. Richter in Hauck & P. Richter
Artist not stated in the record · Oct 1891
Portrait of a Woman
Carl August Senff · 1808
Gloeocapsa reicheltii P. Richter in Hauck & P. Richter
Artist not stated in the record · Sep 1890
Bassoon
Carl August Schaufler · 1830–32
Gongrosira schmidlei P. Richter in Hauck & P. Richter
Artist not stated in the record · 25 May 1893
Glaive, probably of August I of Saxony (reigned 1553–86)
Artist not stated in the record · ca. 1560
Aphanothece nidulans P. Richter in Wittr. & Nordstedt
Artist not stated in the record · 9 Mar 1882
Three Portraits in Profile
Carl August Ehrensvärd · 1765–1800
Protococcus grumosus P. Richter
Artist not stated in the record · 9 Mar 1882
A Storm at Sea with a Large Ship and a Small Boat with Two Figures
Carl August Ehrensvärd · 1765–1800
Oscillatoria scandens P. Richter
Artist not stated in the record · 4 Mar 1881
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. 553 matched · 24 examined · 8 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. 57792 matched · 40 examined · 19 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 2026-09-06 05:24 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.