Previously unknown masterpieces by modernist painters Marc Chagall and Otto Dix are among a vast trove of works believed stolen by the Nazis and uncovered in a Munich flat, an art historian said Tuesday.
A reproduction of paintings by Otto Dix (left and right) and Marc Chagall (centre) on display in Augsburg, southern Germany, on November 5, 2013
Breaking two days of silence following the revelation of the spectacular discovery, Meike Hoffmann, the chief expert aiding the investigation, said the Chagall painting, an allegorical scene dating from the mid-1920s, had a "particularly high art-historical value".
The Dix work is a rare self-portrait probably painted in 1919, she added.
Hoffmann showed slides of the paintings, which also include works by Pablo Picasso, Pierre-Auguste Renoir and Henri Matisse, at a news conference in the southern city of Augsburg where the German authorities shed light on the extraordinary find in the apartment of an eccentric elderly loner.
The man, identified as Cornelius Gurlitt, is the son of Hildebrand Gurlitt, a prominent Nazi-era art dealer who acquired the paintings in the 1930s and 1940s.
Hildebrand Gurlitt had been one of a handful of art experts tasked by the Nazis with selling valuable artworks stolen from Jewish collectors or seized among avant-garde works deemed to be "degenerate".
Augsburg chief prosecutor Reinhard Nemetz said 1,285 unframed and 121 framed paintings, sketches and prints, some dating back to the 16th century, were found in the rubbish-strewn flat.
Focus magazine, which broke the story this week, had reported that the collection comprised 1,500 works worth an estimated one billion dollars ($1.3 billion).
Nemetz declined to comment on the possible market value of the stash.
Determining which works were looted from Jewish collectors by the Nazis or taken from them under duress for a pittance would be a lengthy process, Hoffmann noted.
An 'extraordinarily happy feeling'
In a moment of high drama at the news conference, Hoffmann flicked through slides in the darkened room showing works that had not been seen in public in seven decades.
They included a groundbreaking Expressionist horse painting by Franz Marc, a vivid portrait of a seated woman by Matisse and a touching image of a girl holding a goat by 19th century French master Gustave Courbet.
The Dix painting is a haunting portrayal of the German artist's gaunt face just one year after World War I, a conflict in which he fought and whose horrors left him traumatised, shaping his work until his death in 1969.
Hoffmann said finding the works, many of which were thought lost forever, was "of course an extraordinarily happy feeling", adding that the new discoveries would advance art research.
"It was very emotional for me to see all these works and to realise they still exist," she said.
Nemetz said the authorities had no plans to post an exhaustive list of the works online because it could violate the privacy rights of those claiming ownership and trigger a flood of frivolous requests.
"It would be counterproductive for us. It would endanger the investigation and endanger the artworks," he said.
"We have no interest in sitting on the paintings forever," he added.
Siegfried Kloeble, head of the customs office in Munich, which launched an investigation against Gurlitt on suspicion of tax evasion and misappropriation of assets, said the works were now stored at a secret location as a precaution.
Kloeble said most of the collection, which also included works by Henri de Toulouse-Lautrec, Max Beckmann, Max Liebermann, Emil Nolde, Oskar Kokoschka, Carl Spitzweg and Ernst Ludwig Kirchner, had been kept in a single room of Gurlitt's flat.
"The paintings were stored professionally and are in very good condition," he said, adding that although some appeared soiled, none were damaged.
Nemetz said the elderly recluse had cooperated with the authorities when the works were seized but said they were "not in contact with him currently" and that there was no warrant for his arrest.
Gurlitt's official residence is in Austria but his current whereabouts are unknown.
Nemetz also disputed a key point of the Focus report -- that the raid had already taken place in early 2011 and that the authorities had kept mum since then.
He said that although the investigation started in 2011, the search of the apartment had begun on February 28, 2012 and continued for three days.
The Nazis plundered artworks in Germany and across Europe before and during World War II.
Thousands of stolen artworks have since been returned to their owners or their descendants, but many more have never resurfaced.
Jewish groups have called for an exhaustive search for the provenance of the paintings found in Munich, at least 200 of which were officially reported missing.
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