Cornelius Gurlitt, the German recluse whose Munich apartment housed the largest collection of Nazi-looted artwork recovered since the end of World War II, had a further trove of art in his second home in Austria, it emerged on Tuesday.

The collection, which was seized by German authorities from Gurlitt's second home in Salzburg, Austria, comprises about 60 works including paintings from Monet, Renoir and Picasso. It has not been determined how many of these were confiscated by the Nazis.

"Cornelius Gurlitt has given instructions to turn the works over to experts to investigate whether they were stolen," said his spokesman Stephan Holzinger, adding that a preliminary assessment did not allow the conclusion that the works had been looted by the Nazis.

German prosecutors seized 1,400 modernist works of art from Gurlitt's Munich apartment two years ago. The news only entered the public domain one year later, sending ripples through the art world.

It has yet to be determined how many of the artworks were actually confiscated by the Nazis, with about 600 works currently under investigation. Gurlitt is also being investigated for tax evasion.

Gurlitt's father, Hildebrand, was a prominent art dealer permitted by the Nazis to sell so-called "degenerate art" confiscated from museums on the grounds that it was un-German or Jewish-Bolshevist in nature.

Gurlitt's lawyer Hannes Hartung said in interviews last month that his client is willing to consider restitution claims for works stolen by the Nazis.