Chaos taking over the world during the World War II gave an advantage to art thieves to enrich their own collections or wallets. Adolf Hitler was actually encouraging the looting as he had a dream to create European Art museum no matter the means and the collection was growing with the number of states Fuhrer acquired under his rein.
German loot stored at Schlosskirche Ellingen, Bavaria (April 1945)
After the war the Fine Arts, and Archives program was established to return missing art-pieces to initial owners. Many have been located, but unfortunately there still is plenty to find. The below are listed the most important that are still on the missing list.