An art historian is claiming that two artworks residing inside Germany’s parliament were stolen from their rightful owners by Nazis during World War II. The shocking discovery ran in an article in Bild newspaper on Monday, December 30.

The historian’s investigation into the German parliament’s art collection began in 2012 and determined that an oil painting by Georg Waltenberger and a chalk lithograph by Lovis Corinth had been stolen by Nazis. One of the works was acquired by the parliament from Cornelius Gurlitt, a recluse who was recently accused of hoarding hundreds of masterpieces stolen by Nazis. Gurlitt’s father, Hildebrandt, had been put in charge of selling the stolen artworks by Joseph Goebbels, Hitler’s Minister of Propaganda, but secretly hoarded many of them. 

The parliament’s art collection is comprised of nearly 4,000 works and according to investigations, 108 of those pieces are of unknown provenance. The Central Council of Jews in Germany has called for a list of the parliament’s artworks to be published.