Erasing Jewish collectors' names from Nazi looted art: Alfred Weinberger

Pierre-Auguste Renoir, Public domain, via Wikimedia Commons

 In 2009, Sotheby's put up for sale this Renoir entitled DEUX FEMMES DANS UN JARDIN with the following provenance.

PROVENANCE

Soutro Gallery, London
Sale: Christie's, London, June 24, 1997, lot 284
Private Collection (sold: Sotheby's, New York, November 3, 2005, lot 114)
Acquired at the above sale by the present owner

https://web.archive.org/web/20181204232353/https://www.sothebys.com/en/auctions/ecatalogue/lot.177.html/2009/impressionist-modern-art-day-sale-n08547

No mention of Alfred Weinberger, who had owned the Renoir until a Nazi looting organization seized it in Paris on December 4, 1941.

The above is one of the most typical provenance types that conceals Nazi-looted art. 

French government report 2022: The looting of works of art in France during the Occupation, organized, large-scale actions

Below is a translation into English of the following document:

 Le pillage des oeuvres d'art en France pendant l'Occupation  des actions organisées et de grande envergure  

https://www.culture.gouv.fr/Media/Thematiques/Musees/MNR/Le-pillage-des-aeuvres-d-art-en-France-pendant-l-Occupation.pdf

Allen Loebl

"LOEBL was LOHSE's adviser and intermediary in a substantial number of transactions, and "spotted" pictures for him" 
https://www.dfs.ny.gov/consumer/holocaust/history_art_looting_restitution/The%20Allies/OSS%20and%20the%20ALIU/ALIU%20Reports/bruno_lohse.pdf

Who Was Allen Loebl? (Also: Ali Loebl) What was his role at Galerie Kleinberger in Paris? What was his relationship with Harry G. Sperling at F. Kleinberger & Co. in New York? What were his relations with the Nazi and SS ERR art looter Bruno Lohse? Why did he appear so many times on the Art Looting Investigation Unit Red Flag list?