How to use information in the provenance texts of Nazi looted art that has been restituted to find other Nazi-looted artworks

This Nazi-looted painting was restituted in 2016. 
https://www.lostart.de/de/Verlust/526702

Often, when a painting is restituted, it is the conclusion of a long and arduous process of archival research to establish the itinerary of the painting and the different actors involved in its looting (or sale, or transfer, or translocation). 

What happens if we take the NAMES that appear in the provenance AFTER an artwork has left the possession of the persecuted Jewish owner and plug them in to some powerful digital tools to check other provenance texts for their presence?

Could this application of digital tools provide clues that lead to other Nazi-looted artworks?

Biographies of people involved in the Nazi-looted art trade formerly published on Lostart whose urls no longer seem to work.

 The German Lost Art Foundation published online the biographies of "Beteiligte Privatpersonen und Körperschaftern am NS-Kulturegutraub" which translates to "Private individuals and corporate bodies involved in the NS cultural property theft". 

The  content below has since disappeared from the internet. A few entries can now be found in the internet archive or, in modified form, on Proveana. Others appear to be lost.

Valentin or Buchholz in Provenance Texts of American Museums

Question for art provenance researchers. How many of these artworks display gaps in the provenance for the years 1933-1945?

Which artworks, if any, appear to have the most problematic provenances? Why? 

Loebl in the Kleinberger archives

 

Network described in the 1946 OSS Art Looting Investigation Unit (ALIU) Final Report Red Flag List of Names: Ali (Allen) Loebl and Bruno Lohse

https://www.lootedart.com/MVI3RM469661

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The OSS ALIU Reports on Nazi looting networks in Europe put Allen Loebl at the center of a syndicate of art dealers trading Nazi looted art. Loebl appears in the Red Flag Name index and is mentioned in the Final report fourteen times. The ALIU investigators who drafted the Final Report specified that Loebl had close ties to Bruno Lohse, a notorious Nazi art plunderer. 

At the very least, the mention of Loebl in a provenance from the Nazi era (1933-1945) should mobilise provenance researchers and Holocaust researchers to trace the full history of the artwork in question and to verify whether the artwork belonged to a Jewish collector or dealer who was persecuted when Hitler came to power.  

In this context, the publication of the Kleinberger Archives represents a major step forward. 

https://cdm16028.contentdm.oclc.org/digital/collection/p16028coll23/search/searchterm/loebl

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It was chiefly through LOEBL that LOHSE became familiar with the Paris art trade, and became acquainted with such other dealers and Victor MANDEL, PERDOUX and ENGEL, who operated as an informal syndicate. (See Consolidated Interrogation Report No. 3, "German Methods of Acquisition, " Dealers.)

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The Kleinberger archives are now online. 

Searching is fast and easy. Results show all the mentions, as well as the artists and more. 

Below is the result of a simple search for Loebl, (cousin of Kleinberger president Harry Sperling and a Red Flag Name for his involvement in selling Nazi looted art).

https://cdm16028.contentdm.oclc.org/digital/collection/p16028coll23/search/searchterm/loebl

a.l. paris (36)

allen loebl (19)

a. loebl, paris (11)

a. loebl paris (7)

allen loebl paris (7)

allen loebl, paris (7)

a. l. paris (5)

a. loebl (5)

aly (4)

a.l.paris (3)

aly loebl (3)

hotel drouet sale (3)

a. loebl - paris (2)

a. loebl 2/5 th. share (2)

a.l. paris (1/2 share) (2)

al paris (2)

ali (2)

allen loebl 40% (2)

Hôtel Drouot (2)

45""; in a/c with a.l.; e.l. 10"" (1)

a-l - paris 1/2 share (1)

a-l paris 1/3 share (1)

a. berg estate (1)

a. l. pair (1)

a. l. paris 1/3; mandl 1/3 (1)

a. loebl - paris 1/2 share (1)

a. loebl 40% share (1)

a. loebl, paris 1/2 share (1)

a.a.a. auction (1)

a.l. paris 1/2 share (1)

a.l. paris 1/3 share (1)

a.l. paris memo (1)

a.l.paris 1/2 share (1)

a.l.paris on memo (1)

a.loebl paris (1)

al (1)

al, paris (1)

albert k. schneider (1)

ali, paris (1)

allan loebl 1/2 share (1)

allen lobel (1)

allen loebl (40%) (1)

allen loebl-paris (1)

aly (woog) (1)

American Art Association (1)

american art association, schiff sale (1)

arthur m-rosenbaum (1)

bachstitz hague holland (1)

c.b. duhrkoop (1)

collection privee [private coll.] de m. allen loebl, paris (1)

e. donath thru e. loebl (1)

e. loebl (1)

e.a. silberman (1)

estate of august berg (1)

estate of august bers (1)

estated of a-berg, portland, oregon (1)

f. kleinberger and on join a/c with a.s. drey, munich (1)

f. kleinberger, paris (loebl) (1)

hartford museum (1)

john levy (1)

k. loebl, wien (1)

kleinberger galleries paris allen loebl, paris (1)

lobl, bpest (1)

lobl, budapest (1)

lobl, graf salm, wien (1)

lobl, prince salm, wien (1)

loebl, budapest (1)

momo allen loebl, paris (1)

olshman [?] by aly (1)

on consignment from a. loebl (1)

on memo a loebl (1)

p.w. french & co. (1)

s.w. frankel (1)

veil picard, paris (1)

w.m. griscom jr (1)

The artists concerned by these transactions (according to the website) include:

Corneille, de Lyon, -approximately 1574 (8)

Goyen, Jan van, 1596-1656 (4)

Bourdichon, Jean, 1457?-1521? (3)

Nuzi, Allegretto, active 14th century (3)

Rubens, Peter Paul, 1577-1640 (3)

Avercamp, Hendrick, 1585-1634 (2)

Bellotto, Bernardo, 1722-1780 (2)

Benozzo, di Lese, 1420-1497 (2)

Benson, Ambrosius, 1495-1550 (2)

Brouwer, Adriaen, 1605 or 1606-1638 (2)

Cariani, Giovanni, approximately 1485-approximately 1547 (2)

clouet, francois, -1572 (2)

Gauguin, Paul, 1848-1903 (2)

Goya, Francisco, 1746-1828 (2)

Isenbrant, Adriaen, approximately 1490-1551 (2)

Master of Moulins, active approximately 1480-1503 (2)

Murillo, Bartolomé Esteban, 1617-1682 (2)

Neer, Aert van der, 1603 or 1604-1677 (2)

Orley, Bernard van, -1542 (2)

Ostade, Isack van, 1621-1649 (2)

Painting, Dutch (2)

Rembrandt Harmenszoon van Rijn, 1606-1669 (2)

Steen, Jan, 1626-1679 (2)

teniers, david, 1638-1685 (2)

Van Dyck, Anthony, 1599-1641 (2)

achenbach, andreas, 1815-1910 (1)

Alken, Henry Thomas, 1784-1851 (1)

Apollonio di Giovanni, approximately 1415-1465 (1)

bardou, miguel arias, 1841-1915 (1)

Battaglioli, Francesco, approximately 1710-approximately 1796 (1)

beert, osias, approximately 1580-1624 (1)

Beyeren, Abraham van, approximately 1620-1690 (1)

Bijlert, Jan van, 1597 or 1598-1671 (1)

Boccaccino, Boccaccio, -1525 (1)

Borch, Gerard ter, 1617-1681 (1)

Bourdon, Sébastien, 1616-1671 (1)

Bouts, Albrecht, -1549 (1)

Brekelenkam, Quiringh Gerritsz., approximately 1620-1668 (1)

Breu, Jörg, approximately 1480-1537 (1)

Bruegel, Jan, 1568-1625 (1)

campin, robert, -1444 (1)

Carriera, Rosalba, 1675-1757 (1)

Cleve, Joos van, -approximately 1540 (1)

Codde, Pieter, 1648-1710 (1)

Coffermans, Marcellus, approximately 1525-approximately 1578 (1)

conti, francesco, 1681 or 1682-1732 (1)

Copley, John Singleton, 1738-1815 (1)

Costa, Lorenzo, 1460-1535 (1)

Couture, Thomas, 1815-1879 (1)

Cranach, Lucas, 1472-1553 (1)

Cuyp, Aelbert, 1620-1691 (1)

dorigny, charles, active 16th century (1)

Dou, Gerard, 1613-1675 (1)

Dou, Gerard, 1613-1675. (1)

duplessis, joseph-siffrede, 1725-1802. (1)

Engelbrechtszoon, Cornelis, 1468-1533 (1)

Eyck, Jan van, 1390-1440 (1)

Fabritius, Barent, 1624-1673 (1)

Flinck, Govaert, 1615-1660 (1)

francois i period-early xvith (1)

Gaddi, Taddeo, approximately 1300-approximately 1366 (1)

Géricault, Théodore, 1791-1824 (1)

giovanni, da milano, active 14th century (1)

Goya, Francisco, 1746-1828. (1)

Heemskerk, Martin van, 1498-1574 (1)

Helt Stockade, Nicolaes van, 1614-1669 (1)

hemessen, jan sanders van, approximately 1500-approximately 1563 (1)

Hogarth, William, 1697-1764 (1)

Hooch, Pieter de (1)

horenbout, lucas, approximately 1490-1544 (1)

Jordaens, Jacob, 1593-1678 (1)

joudreville, isaac de, 1613-1648 (1)

Knijff, Wouter, approximately 1607- after 1693 (1)

Lancret, Nicolas, 1690-1743 (1)

Laurencin, Marie, 1883-1956 (1)

Le Nain, Antoine, 1588-1648 (1)

lepoittevin, eugene-modeste-edmond, 1806-1870 (1)

Longhi, Pietro, 1702-1785 (1)

Lucas y Villamil, Eugenio, 1858-1890 (1)

mandyn, jan, approximately 1500-1559 (1)

Mariotto di Nardo, active 1393-1424 (1)

masquerier, john james, 1778-1855 (1)

master of the magdalen, approximately 1265-1290 (1)

Molenaer, Klaes, before 1630-1676 (1)

Mor, Anthonis, approximately 1517-1576 or 1577 (1)

Moretto, da Brescia, 1498?-1554 (1)

munkacsy, mihaly, 1844-1900 (1)

Neri di Bicci, 1419-1491 (1)

os, jan van, 1744-1808 (1)

Ostade, Adriaen van, 1610-1685 (1)

Palamedesz., Anthonie, 1601-1673 (1)

Palma, il Vecchio, 1480?-1528 (1)

perrier, francois, 1590?-1656? (1)

pilon, germain, approximately 1535-1590 (1)

Pluym, Karel van der, 1625-1672 (1)

Provost, Jan, 1465-1529 (1)

Raphael, 1483-1520 (1)

Reynolds, Joshua, Sir, 1723-1792 (1)

rivelli, galeazzo, active 14th century (1)

Robie, Jean, 1821-1910 (1)

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The Kleinberger Archives offer new possibilities for research.

note: Under Harry Sperling, the president of Kleinberger and Allen Loebl's cousin, the Kleinberger art dealership got up to all kinds of tricky business. 


Sperling deserves a serious investigative biography that takes into account his art dealing, smuggling, and intelligence-related activities, which are attested in numerous documents.

This new resource, which makes it possible to quickly search through the Kleinberger files, should help researchers who want to shed like on these transactions.