Complex sentence: In 1911 her neglected grave was found in a garden in Berlin and after it's owner, Walther Rathenau, contacted Queen Wilhelmina of the Netherlands, Princess Paulina was transferred to the Royal Crypt in the Nieuwe Kerk in Delft.
Split into simpler sentences: In 1911 her neglected grave was found in a garden in Berlin. After its owner, Walther Rathenau, contacted Queen Wilhelmina of the Netherlands, Princess Paulina's body was transferred to the Royal Crypt in the Nieuwe Kerk in Delft.