An oil painting by Claude Monet of London's Waterloo Bridge is among 180 artworks recently uncovered in Austria as part of the Nazi-looted art investigation centered around Cornelius Gurlitt.

The 1903 Monet is worth several million dollars, and was part of a newly-discovered trove of works including a bronze sculpture by Renoir and drawings by Gauguin, Cezanne and Picasso.

In 2012, German authorities in Munich found the first collection of 1,280 works that Gurlitt, 81, said were passed down from his art dealer father, who worked for the Nazis.

A second home of Gurlitt's in Salzburg, Austria, yielded up more artworks. Last week, a Vienna-based reporter uncovered that a third Gurlitt trove was located in another building, which revealed the Monet.

Among the Gurlitt collection of some 1,500 artworks altogether, there were 238 works found in Austria that are currently in a high-security storage unit that is being combed through.

Through his lawyers, Gurlitt said last week that he would return any stolen artworks to their original owners. Provenance research has been slow as some pieces were bought legitimately by Gurlitt's father before or after the war and many artworks will be a matter of contention since they were acquired, often through forced sales, during the war.