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 “Adrian Ludwig Richter” — 64 records examined, 2 dropped by the rights gate.
Archives queried 2026-08-28 07:39 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
View of Milan
Adrian Ludwig Richter · 1820–84
Althaea pallida Waldst. et al.
Artist not stated in the record · 27 Aug 1886
Three Women and a Child on a Roof
Adrian Ludwig Richter · 1820–84
Dianthus plumarius L.
Artist not stated in the record
Richter's Werke (binder's title)
Adrian Ludwig Richter · 1879
Sporobolus aculeatus (L.) P.M. Peterson
Artist not stated in the record · Oct 1874
Alte und neue Kinderlieder, Fabeln, Sprüche und Räthsel
Adrian Ludwig Richter · 1849
Sporobolus alopecuroides (Piller & Mitterp.) P.M. Peterson
Artist not stated in the record · Ende September 1829
Vater Unser in Bildern
Adrian Ludwig Richter · ca. 1856
Bromus arvensis L.
Artist not stated in the record · Aug 1901
Landscape with Mill and Buildings
Adrian Ludwig Richter · 1820–84
Bromus hordeaceus L.
Artist not stated in the record · 1 Jul 1902
Two Designs for Illustration
Adrian Ludwig Richter · 1820–84
Bromus ramosus Huds.
Artist not stated in the record · 25 Jun 1902
Genoveva
Adrian Ludwig Richter · 1872
Tortula muralis
Artist not stated in the record
Rübezahl
Adrian Ludwig Richter · 1872
Tortula muralis
Artist not stated in the record
Three Designs for Book Illustrations
Adrian Ludwig Richter · 1820–84
Hibiscus trionum L.
Artist not stated in the record · 16 Sep 1878
Christenfreude in Lied und Bild
Adrian Ludwig Richter · 1855
Salvia sylvestris L.
Artist not stated in the record · Jun 1874
Gustav Karl Ludwig Richter
Loescher & Petsch · after 1867
Dianthus carthusianorum var. saxigenus Schur
Artist not stated in the record · 8 Jul 1894
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. 65 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. 5017 matched · 40 examined · 2 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 2026-08-28 07:39 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.