Kunstmuseum Bern announced Monday at a news conference with the German and Bavarian governments that it would accept the bequest of 1,300 artworks from Cornelius Gurlitt, the son of an art dealer active under the Nazi regime.

The Swiss museum was named the sole heir of Gurlitt's estate after his death at age 81 in May. The museum has agreed to publish a list of the inherited works and Gurlitt's ledgers. 

Since the collection was discovered in Gurlitt's Munich apartment two years ago, provenance has been slow to be revealed. Just prior to his death, Gurlitt agreed that Germany would create a task force to uncover provenance and restitute all looted pieces. The museum says it will comply and return artworks to rightful owners or heirs. But critics have decried the length of time and lack of transparency so far in the proceedings.

Three works are said to be on the list to return immediately, including works by artists Max Liebermann, Henri Matisse and Carl Spitzweg.

In a new twist, Uta Werner, Gurlitt’s 86-year-old cousin, applied to the Munich Probate Court for a certificate of inheritance for his estate on Friday. Werner claims that her cousin's mental capacity at the time of the bequest was questionable.