Showing posts with label art collectors in Holocaust. Show all posts

Jul 28, 2025

Who owned Pissarros? What else did they own? Where are they today?

What else? German and French Jews who were persecuted by the Nazis often owned artworks from several different artists. If one focuses on claims for one artist, can one then expand the search to see what other artworks were stolen?

In this post we look at artworks by Pissarro which are being searched for by the families of Jewish art collectors who were plundered and persecuted during the Nazi era. And then we ask: what other artworks were owned by (and possibly stolen from) these same collectors?

To gather these artworks, and the information about them, we will use Wikidata queries. The graph structure enables us to start from one point (the collector) and move to other artworks owned all around the world. (if the ownership information has been entered in Wikidata.

Databases consulted: Lostart.de and ErrProject

PART ONE

Lostart: Collectors whose heirs are searching for PISSARRO artworks lost or seized during the Nazi era:

Aaron, Clémence Georgette

Blumstein (Familie)*

Bondi, Felix

Braunthal, Max

Dreyfus, Edgar*

Flavian (Friedmann), Catherine und Salomon

Friedmann, David (Breslau)

Glaser, Prof. Dr. Curt

Goldschmidt, Hedwig und Jacob*

Hatvany, Baron Ferenc

Heine, Max & Margarete

Herz, Dr. Emanuel Emil

Hinrichsen, Dr. Henri

Kainer, Margret und Ludwig

Katzenellenbogen, Ludwig und Estella

Lindauer, Jules

Mendel Kaplan

Nathan, Martha

Ploschitzki, Johanna (geb. Zender)

Posen, Anna und Sidney

Sachs, Carl (Sammlung)

Schusterman, Grégoire

Semmel, Richard

Silberberg, Max (Sammlung)

Simon, Hugo

Sommerguth, Gertrud und Alfred

Steinthal, Fanny und Max (Sammlung)

Stern-Lippmann, Margaretha und Siegbert Stern

Strauss, Ottmar

Westfeld, Walter

ERRProject: French Jews whose artworks by Pissarro were looted by the ERR Nazi looting organization

Bruno Stahl

Claude Raphael, Paris, France

Frau Jules Rouff, Paris, France

Galerie Marcel Bernheim et Cie., Paris, France

Georges Levy, Paris, France

Georges Schick, Nice, France

Hedwige/Hedwig Zach/Zak, Nice/Paris, France

Hugo Simon, Paris, France

Jules et Madeleine Lindauer, Paris, France

Max Heilbronn, Paris, France

Mr. Kantorowitz, Paris, France

Oskar and Marianne Goldschmidt, Neuilly, France

Paul Etlin, Saint-Marcel par Aubagne, Bouches du Rhone, France

Paul Rosenberg, Bordeaux, France

Pierre Wertheimer, Paris, France

Raoul Meyer, Paris, France

Roger Levy , Neuilly s/Seine, France

Salomon Flavian, Paris, France

Simon Bauer, Paris, France

Remarks: There are 48 German and French art collectors who owed Pissarros in these Nazi-looted art databases. Hugo Simon and Jules Lindauer appear in both LostArt and ERRPROJECT but otherwise there is little overlap. To have a more complete view of Pissarros looted from (or acquired under duress from) Jewish collectors, one would need to consult databases in The Netherlands, Austria, Belgium, Poland, and elsewhere. In short, this is a glimpse or a sampling, not a complete overview.

The appearance of any of the above names in a provenance for any artwork is an obvious red flag.

Are there any patterns we might be able to detect using the Wikidata general knowledge graph?

To find out, we will group the Wikidata identifiers (where they exist) in a variable called ?LostPissarro using VALUES

Wikidata Query

#title:Pissarro owners in Lostart.de

SELECT ?myQids ?myQidsLabel ?myQidsDescription

WHERE {

VALUES ?myQids { wd:Q126835436 wd:Q94292296 wd:Q124216935 wd:Q125884667 wd:Q97133770 wd:Q112450 wd:Q324935 wd:Q55842863 wd:Q98887 wd:Q1334632 wd:Q123758642 wd:Q19295051 wd:Q1361426 wd:Q110491536}

?myQids rdfs:label ?myQidsLabel.

#?ownedby wdt:P127 ?myQids.

# ?ownedby wdt:P18 ?image.

SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],mul,en". }

FILTER (LANG(?myQidsLabel) = "en")

}

WD:

* not found

Q126835436,Q94292296,Q124216935,Q125884667,Q97133770,Q112450,Q324935,Q55842863,Q1334632,Q98887,Q123758642,Q19295051,Q1361426,Q110491536,Q131534758,Q131424365,Q104532626,Q22670686,Q131534959,Q94867126,Q125811605,Q125811605,Q20191393,Q1913457,Q1635718,Q94788180,Q108549525,Q126092724,Q100323618,Q2037856,Q2546745

myQids	myQidsLabel	myQidsDescription
http://www.wikidata.org/entity/Q55842863	Max Hermann Heine	German Jewish art collector (1877-1933)
http://www.wikidata.org/entity/Q94292296	Felix Bondi	German lawyer and art collector (1860-1934)
http://www.wikidata.org/entity/Q97133770	David Friedmann	German Jewish businessman and art collector -(1857-1942)
http://www.wikidata.org/entity/Q110491536	Estella Katzenellenbogen	German Jewish art collector persecuted by the Nazis (1886-1991)
http://www.wikidata.org/entity/Q123758642	Margret Kainer	German Jewish art collector (1894-1968)
http://www.wikidata.org/entity/Q124216935	Max Braunthal	German Jewish art collector (1877-1946)
http://www.wikidata.org/entity/Q125884667	Salomon Flavian	art collector
http://www.wikidata.org/entity/Q126835436	Clémence Georgette Aaron	French art collector, plundered by Nazis (b. 1867
http://www.wikidata.org/entity/Q98887	Henri Hinrichsen	German music publisher, died in Auschwitz in 1942
http://www.wikidata.org/entity/Q112450	Curt Glaser	German Jewish art historian and art collector persecuted by Nazis, refugee (1879-1943)
http://www.wikidata.org/entity/Q324935	Ferenc Hatvany	Hungarian painter and art collector (1881-1958)
http://www.wikidata.org/entity/Q1334632	Emil Herz	German publisher (1877-1971)
http://www.wikidata.org/entity/Q1361426	Ludwig Katzenellenbogen	Jewish industrialist, refugee, Holocaust victim, husband of Tilla Durieux (1877–1944)
http://www.wikidata.org/entity/Q19295051	Ludwig Kainer	German draughtsperson and art collector (1885-1967)

WikidataQuery to see what was owned by these individuals

https://w.wiki/CUi7

https://w.wiki/CUqd

https://w.wiki/CUqf

with image of painting https://w.wiki/CUqq

https://w.wiki/CVCX

https://w.wiki/CVFT

with images of paintings https://w.wiki/CVJw

https://w.wiki/CVM5

LostArtQids https://w.wiki/CVfd

LostArtQids with objects owned https://w.wiki/CVfg

Question: How many of the artworks searched for by

Q126835436,Q94292296,Q124216935,Q125884667,Q97133770,Q112450,Q324935,Q55842863,Q1334632,Q98887,Q123758642,Q19295051,Q1361426,Q110491536,Q131534758,Q131424365,Q104532626,Q22670686,Q131534959,Q94867126,Q125811605,Q125811605,Q20191393,Q1913457,Q1635718,Q94788180,Q108549525,Q126092724,Q100323618,Q2037856,Q2546745

Are represented in Wikidata?

Task: Compare Lostart listings to Wikidata listings

Oct 22, 2024

Max Silberberg owned Manet's La Sultane from 1928 to 1937, according to the Kunsthaus Zürich

The provenance of Manet's La Sultane, also known as Woman in Oriental Garb, has changed so often that it can be hard to keep up. The ownership by Holocaust victim Max Silberberg, which was challenged and undermined by speculation in previous iterations of the provenance published by the Bührle Foundation, has now been definitively confirmed by the Kunsthaus Zürich.

Silberberg owned the painting continuously from 1928 to 1937.

The Kunsthaus Zürich publishes a page with "drawers" of documents and information from the collection.

https://www.kunsthaus.ch/en/buehrle-provenance-drawers/

Art Market Network Analysis with Wikidata Sparql Queries and Beyond

What might replicable data pipeline from #Wikidata #KG Query to Data Frame to Network Visualisation of owners of artworks passing through a specific network look like?
Perls Family Network-Red
Links to other owners-Blue
Jupyter Notebook in Google CoLabs
👉https://t.co/2oyU0kmuqi pic.twitter.com/UdQhY8ZKVp
— Open Art Data | @openartdata.bsky.social (@OpenLinkArtData) August 21, 2024

What might replicable data pipeline from #Wikidata #KG Query to Data Frame to Network Visualisation of owners of artworks passing through a specific network look like?

In the example below, we look at 27 artworks that passed through one of the members of the Perls art dealing dynasty or one of their companies.

The starting point is a Wikdata Query to retrieve the artworks known to have been owned by one of the Perls family, as well as the other known owners of the same artworks.

The information is retrieved from Wikidata, loaded into a Data Frame, then visualised with MatPlotLib.

The code is saved in a Jupyter Notebook and Shared publicly via Google Colab.

Anyone with a Google Account should be able to run the code simply by clicking on the arrows to the left of each code cell.

Try it and let me know if it works.

https://colab.research.google.com/drive/1f7V2SMzxkCmt2lbCS3l4ulotqUGghNAm#scrollTo=0sPcg-gWZOo3

Perls Family Network-Red

Links to other owners-Blue

Jupyter Notebook in Google CoLabs

https://colab.research.google.com/drive/1f7V2SMzxkCmt2lbCS3l4ulotqUGghNAm#scrollTo=0sPcg-gWZOo3

Dec 19, 2021

Art collectors and the Holocaust: itineraries from birth to death

Henri Rieger, born in Sered, died in Theresienstadt

Henri Hinrichsen, born in Hamburg, died in Auschwitz

Rosa Oppenheimer, born in Berlin, died in Auschwitz

Ernst Pollack, born in Vienna, died in Theresienstadt concentration camp

Margarete Mauthner, born in Berlin, escaped Nazi Germany to die thousands of miles away in Johannesburg South Africa

Maria Altmann, born in Vienna, escaped Nazi Austria and died thousands of miles away in Los Angeles, California.

Click on the Play Arrow

https://public.flourish.studio/visualisation/8168334/

****

How was this interactive data visualization created?

Note: this map only shows birth and death places, not the many other places these art collectors lived.

1) Gather the birth and death places of the selected art collectors and dealers, along with coordinates, latitude and longitude. (Wikidata Query)

https://w.wiki/4a4s

#Places of Death or Birth (with coordinates long and lat) for Art historians dealers collectors museum directors restorers 
SELECT DISTINCT ?place ?placeLabel ?coord ?lat ?long
WHERE 
{
  {?item wdt:P106 wd:Q1792450} UNION {?item wdt:P106 wd:Q173950} UNION {?item wdt:P106 wd:Q10732476} UNION {?item wdt:P106 wd:Q674426} UNION {?item wdt:P106 wd:Q22132694} UNION {?item wdt:P106 wd:Q2145981} 
  
?item (wdt:P20|wdt:P19) ?place.
   ?place wdt:P625 ?coord.
   ?place p:P625 ?statement.
   ?statement psv:P625 ?coordinate_node .
  ?coordinate_node wikibase:geoLatitude ?lat .
  ?coordinate_node wikibase:geoLongitude ?long .

  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". } # Helps get the label in your language, if not, then en language
}

Download the result of the query. This will provide the location data file for Flourish.

2) Gather the names, descriptions, birth and death places and dates (as well as additional information) about the art collectors.

Link to Wikidata query used in this data visualisation with birth and death places

https://w.wiki/4Zsq

3) Select a data visualization template in Flourish

Selected template
Connections globe4.0.0

4) Upload two data files into Flourish, a file with the geographical names and locations, and a file with the birth and death places of the art collectors and dealers selected

5) Format (still in progress) and publish

Dec 31, 2020

Portraits of Murder and Plunder

Amalie Zuckerkandl was at the height of her beauty when Gustav Klimt begin this (unfinished) portrait of her in 1917-8. A member of the Viennese Zuckerkandl family, Amalie was murdered in the Holocaust along with her daughter Nora Stiansy because they were Jewish, and her portrait was stolen by Nazis.

Serena (Szeréna) Lederer was the model for this beautiful portrait by Gustav Klimt. Her family, which was Jewish, was plundered by the Nazis. Serena Lederer died in 1943 as a refugee from Nazism.

This magnificent portrait by Klimt depicts the Jewish Austrian intellectual and feminist Adele Bloch-Bauer. Commissioned by her husband, Ferdinand Bloch-Bauer, a Jewish banker and sugar producer, the painting was looted by the Nazis in 1941, along with numerous other artworks.

Irène Cahen d'Anvers was eight years old when her father, the French Jewish banker Louis Cahen d'Anvers, commissioned this lovely portrait from Pierre-Auguste Renoir in 1880. During World War II, the Nazis stole the portrait and murdered Irène's daughter, Béatrice, her ex-son-in-law and their two children because of their Jewish ancestry.

The painter Eduard Einschlag was murdered in the Treblinka concentration camp in 1942, and his estate was confiscated. He painted this self portrait in 1930.

Renoir painted this portrait of the Austrian actress Tilla Durieux (Ottilie Godeffroy, 1880–1971) in 1914 when she was married to the art dealer Paul Cassirer. After Cassirer's suicide she married Ludwig Katzenellenbogen who was deported and murdered in the Nazi Sachsenhausen concentration camp in 1944 because Jewish.

Selfportrait by the German Jewish painter Ernst Oppler, showing himself as an art collector. Ernest Oppler died in 1929, thus escaping the Holocaust, but many members if his family were plundered and persecuted by the Nazis; his brother, the doctor Berthold Oppler, committed suicide in detention on 6 January 1943 to avoid imminent deportation to a Nazi death camp.

The German Jewish painter Charlotte Salomon looks warily at the viewer in this self-portrait from 1940; her family fled Germany for France after Kristallnacht but, five months pregnant, she was captured and murdered in Auschwitz in 1943.

This brooding self-portrait was painted by the German Jewish artist Felix Nussbaum who died in Auschwitz in 1944.

Getrud Loew was the daughter of Gustav Klimt's doctor, Anton Loew. She was 19 years old when this portait was painted (see full length here). She managed to escape Nazi Vienna in 1939, under her widowed name Gertha Felsöványi.

"Pieces with titles that referenced their Jewish origins, were completely changed. For example, The Portrait of Margaret Stonborough Wittgenstein (a Jew) became Damenbildnis in Weiss (Portrait of a lady in white)." - (Morowitz, Laura. “‘Heil the Hero Klimt!’: Nazi Aesthetics in Vienna and the 1943 Gustav Klimt Retrospective.” Oxford University Press 39, no. 1 (2016): 122-23. cited by Gabrielle Knight in Honors Thesis)

Little is known about Walburga "Wally" Neuzil, the blue-eyed model painted by Egon Schiele in 1912. The portrait was stolen by a Nazi art dealer from the collection of Jewish collector Lea Bondi Jaray when her gallery was Aryanized by Nazis in 1939 and she was forced to flee Vienna as a Jew.

For more reading, see:

Un tableau de Klimt volé par les nazis n'a jamais été restitué à son propriétaire

‘Heil the Hero Klimt!’: Nazi Aesthetics in Vienna and the 1943 Gustav Klimt Retrospective

Leipzig gibt jüdischer Familie ein Stück Geschichte zurück

A Blood-Stained Renoir on Exhibit in Paris

Leipzig Mayor Hand Delivers Nazi-era Art to Painter's Heirs

Case Review: Cassirer v. Thyssen-Bornemisza Collection Foundation

Holocaust Victim Assets Litigation Case No. CV96-4849

Ein Haus wie ein Museum

Die Stiftung Preußischer Kulturbesitz gibt Kunstwerke aus der Sammlung des von den Nationalsozialisten verfolgten und ermordeten Max Silberberg zurück.

Münchner Kunstfund Bewusst verschleiert

A Tale of Two Portraits, by Rudolf Beran

Raubkunstverdacht: Der Kandinsky-Konflikt

Der Schandfleck

Bank's Kandinsky painting was looted by Nazis, says family

Apr 30, 2020

Tracing Jewish Art Collectors and other #LostArtPeople by Place of Death

In our previous post, we introduced the idea of using Wikidata Queries to Trace Jewish art collectors and their collections.

In this post, we begin to look at how we might identify these Jewish individuals, many of whom have been not only forgotten but deliberately written out of history.

What information or feature might help us to identify them?
What do we know about them?

They died after 1932
They were connected to the arts in some way: as collectors, dealers, curators, historians, curators, museum directors, gallery owners, possibly as artists
Their names might have appeared in exhibitions or catalogs as owners or lenders or donors or experts, or in books or articles as authors, in the provenance texts of collections, for example.

The above criteria is very large and not specific to Jewish collectors in the Nazi era. How can we further narrow the criteria? One element that distinguishes the fates of Jewish individuals from others is how and where they died, and whether or not they were interned, spoliated or became refugees.

What kind of markers can we look for in the data?

Place of death
Year of death
Cause of death
Place of internment
Significant events like aryanization or arrest or deportation

All of the above correspond to "Properties" that are defined in Wikidata. Not all these properties have been updated for every Wikidata item. But they could be.

A Wikidata Query can easily show us all the people who are known (in Wikidata) to have died or been interned in a Nazi camp or ghetto.

How to do this?

There were so many Nazi camps in so many countries (see below) that we look for a way to take each one into account without necessarily naming each one in a query.

One way is to use Wikidata's "instance of" (P31).

We can tell the query to list people who died in a place that is defined as any of the following things:

Nazi concentration camp (Q328468)
concentration camp (Q152081)
extermination camp (Q153813)
ghetto in Nazi-occupied Europe (Q2583015)

We might still miss a few of the camps (due to the crowdsourcing nature of Wikidata, not every item is coded in exactly the same way,) but this should be a good start.

There are several ways to do OR type queries in Wikidata.

We will use the very straight forward UNION. (Please do not hesitate to suggest better ways).

WHERE {
{ ?placedied wdt:P31 wd:Q328468.} UNION { ?placedied wdt:P31 wd:Q152081. } UNION { ?placedied wdt:P31 wd:Q153813.} UNION { ?placediedwdt:P31 wd:Q153813.} UNION { ?placedied wdt:P31 wd:Q2583015.}

To make the Wikidata query run faster and avoid time outs, we will first check that the place of death has been entered by someone into Wikidata.

?item wdt:P20 ?placedied.

Then, instead of specifying, as we did in the previous query, that we want to list the people who died in the specific Nazi concentration camp of Auschwitz-Birkenau

?item wdt:P20 wd:Q7341.

we want to request people who died in any place coded as an instance of Q328468, Q152081, Q153813 or Q2583015

{ ?placedied wdt:P31 wd:Q328468.} UNION { ?placedied wdt:P31 wd:Q152081. } UNION { ?placedied wdt:P31 wd:Q153813.} UNION { ?placedied wdt:P31 wd:Q153813.} UNION { ?placedied wdt:P31 wd:Q2583015.}

This should include all the Nazi camps and ghettos listed at the bottom of this post

_______

SELECT DISTINCT ?item ?itemLabel ?pic ?datedied ?placediedLabel ?placedied ?child ?childLabel ?ownedby ?ownedbyLabel ?depicts ?depictsLabel ?depictedby ?depictedbyLabel ?countryLabel ?ownerof ?ownerofLabel ?spouse ?employer ?employerLabel ?spouseLabel ?mother ?motherLabel ?father ?fatherLabel ?sibling ?siblingLabel ?investby ?investbyLabel ?sigperson ?sigpersonLabel ?party ?partyLabel ?partner ?partnerLabel WHERE {

{ ?item wdt:P106 wd:Q1792450.} UNION { ?item wdt:P31 wd:Q1007870. } UNION { ?item wdt:P106 wd:Q173950.} UNION { ?item wdt:P921 wd:Q328376.} UNION { ?item wdt:P106 wd:Q10732476.} UNION { ?item wdt:P106 wd:Q446966.} UNION { ?item wdt:P106 wd:Q22132694.} UNION { ?item wdt:P106 wd:Q674426.}

SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }

?item wdt:P20 ?placedied.

{ ?placedied wdt:P31 wd:Q328468.} UNION { ?placedied wdt:P31 wd:Q152081. } UNION { ?placedied wdt:P31 wd:Q153813.} UNION { ?placedied wdt:P31 wd:Q153813.} UNION { ?placedied wdt:P31 wd:Q2583015.}

OPTIONAL { ?item wdt:P18 ?pic. }

OPTIONAL { ?item wdt:P127 ?ownedby. }

OPTIONAL { ?item wdt:P570 ?datedied. }

OPTIONAL { ?item wdt:P20 ?placedied. }

OPTIONAL { ?item wdt:P180 ?depicts. }

OPTIONAL { ?item wdt:P921 ?plunder. }

OPTIONAL { ?item wdt:P1830 ?ownerof. }

OPTIONAL { ?item wdt:P108 ?employer. }

OPTIONAL { ?item wdt:P569 ?birth. }

OPTIONAL { ?item wdt:P40 ?child. }

OPTIONAL { ?item wdt:P214 ?VIAF_ID. }

OPTIONAL { ?item wdt:P19 ?place_birth. }

OPTIONAL { ?item wdt:P244 ?Library_of_Congress_authority_ID. }

OPTIONAL { ?item wdt:P227 ?GND_ID. }

OPTIONAL { ?item wdt:P245 ?ULAN_ID. }

OPTIONAL { ?item wdt:P26 ?spouse. }

OPTIONAL { ?item wdt:P27 ?country. }

OPTIONAL { ?item wdt:P3342 ?sigperson. }

OPTIONAL { ?item wdt:P102 ?party. }

OPTIONAL { ?item wdt:P1327 ?partner. }

OPTIONAL { ?item wdt:P1840 ?investby. }

OPTIONAL { ?item wdt:P25 ?mother. }

OPTIONAL { ?item wdt:P22 ?father. }

OPTIONAL { ?item wdt:P3373 ?sibling. }

OPTIONAL { ?item wdt:P1299 ?depictedby. }

OPTIONAL { ?item wdt:P39 ?position. }

FILTER (YEAR(?datedied) >= 1933 )

}

LIMIT 20000

_______

note: careful: the filter should read datedied "greater than or equal to" 1933. Sometimes the greater than symbol gets garbled on this blog

(Notice the word OPTIONAL? We are telling Wikidata to get the information if it is available but not to worry about it if it is not. Since we want to understand who these individuals were, the context of their lives and their relations with others, we have added much optional information to the query. This is not strictly speaking necessary, but possibly useful for future network analysis)
The Wikidata Sparql Query can present the results in many different ways.

As a table.

As a graph.

With photos

We can zoom in close to view certain specific elements that are hard to see when looking at lots of data.

We also get an idea of where data might be missing.

Camps and ghettos listed in the Wikidata Query

SELECT ?placedied ?placediedLabel
WHERE
{
{ ?placedied wdt:P31 wd:Q328468.} UNION { ?placedied wdt:P31 wd:Q152081. } UNION { ?placedied wdt:P31 wd:Q153813.} UNION { ?placedied wdt:P31 wd:Q153813.} UNION { ?placedied wdt:P31 wd:Q2583015.}
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}

(Short link to query and result - Try it!)

... Open Art Data ...

Pages

Jul 28, 2025

Who owned Pissarros? What else did they own? Where are they today?

PART ONE

Lostart: Collectors whose heirs are searching for PISSARRO artworks lost or seized during the Nazi era:

ERRProject: French Jews whose artworks by Pissarro were looted by the ERR Nazi looting organization

Are there any patterns we might be able to detect using the Wikidata general knowledge graph?

Wikidata Query

Oct 22, 2024

Max Silberberg owned Manet's La Sultane from 1928 to 1937, according to the Kunsthaus Zürich

Aug 21, 2024

Art Market Network Analysis with Wikidata Sparql Queries and Beyond

Dec 19, 2021

Art collectors and the Holocaust: itineraries from birth to death

Henri Rieger, born in Sered, died in Theresienstadt

Henri Hinrichsen, born in Hamburg, died in Auschwitz

Rosa Oppenheimer, born in Berlin, died in Auschwitz

Ernst Pollack, born in Vienna, died in Theresienstadt concentration camp

Margarete Mauthner, born in Berlin, escaped Nazi Germany to die thousands of miles away in Johannesburg South Africa

Maria Altmann, born in Vienna, escaped Nazi Austria and died thousands of miles away in Los Angeles, California.

How was this interactive data visualization created?

1) Gather the birth and death places of the selected art collectors and dealers, along with coordinates, latitude and longitude. (Wikidata Query)

3) Select a data visualization template in Flourish

Selected template
Connections globe4.0.0

4) Upload two data files into Flourish, a file with the geographical names and locations, and a file with the birth and death places of the art collectors and dealers selected

5) Format (still in progress) and publish

Dec 31, 2020

Portraits of Murder and Plunder

Apr 30, 2020

Tracing Jewish Art Collectors and other #LostArtPeople by Place of Death

In this post, we begin to look at how we might identify these Jewish individuals, many of whom have been not only forgotten but deliberately written out of history.

A Wikidata Query can easily show us all the people who are known (in Wikidata) to have died or been interned in a Nazi camp or ghetto.

Camps and ghettos listed in the Wikidata Query

Pages

Jul 28, 2025

Who owned Pissarros? What else did they own? Where are they today?

PART ONE

Lostart: Collectors whose heirs are searching for PISSARRO artworks lost or seized during the Nazi era:

ERRProject: French Jews whose artworks by Pissarro were looted by the ERR Nazi looting organization

Are there any patterns we might be able to detect using the Wikidata general knowledge graph?

Wikidata Query

Oct 22, 2024

Max Silberberg owned Manet's La Sultane from 1928 to 1937, according to the Kunsthaus Zürich

Aug 21, 2024

Art Market Network Analysis with Wikidata Sparql Queries and Beyond

Dec 19, 2021

Art collectors and the Holocaust: itineraries from birth to death

Henri Rieger, born in Sered, died in Theresienstadt

Henri Hinrichsen, born in Hamburg, died in Auschwitz

Rosa Oppenheimer, born in Berlin, died in Auschwitz

Ernst Pollack, born in Vienna, died in Theresienstadt concentration camp

Margarete Mauthner, born in Berlin, escaped Nazi Germany to die thousands of miles away in Johannesburg South Africa

Maria Altmann, born in Vienna, escaped Nazi Austria and died thousands of miles away in Los Angeles, California.

How was this interactive data visualization created?

1) Gather the birth and death places of the selected art collectors and dealers, along with coordinates, latitude and longitude. (Wikidata Query)

3) Select a data visualization template in Flourish

Selected template Connections globe4.0.0

4) Upload two data files into Flourish, a file with the geographical names and locations, and a file with the birth and death places of the art collectors and dealers selected

5) Format (still in progress) and publish

Dec 31, 2020

Portraits of Murder and Plunder

Apr 30, 2020

Tracing Jewish Art Collectors and other #LostArtPeople by Place of Death

In this post, we begin to look at how we might identify these Jewish individuals, many of whom have been not only forgotten but deliberately written out of history.

A Wikidata Query can easily show us all the people who are known (in Wikidata) to have died or been interned in a Nazi camp or ghetto.

Camps and ghettos listed in the Wikidata Query

Selected template
Connections globe4.0.0