My dad (turns 90 this year) was on the 16th level and inventoried and guarded the diamonds and jewels. I believe the art work was on the 14th level. He said when Eisenhower came down to assess the area, he made a new policy that an Officer and an enlisted man had to be down there together. He has some really interesting stories, as all those WWII Vets do.
My family all served in the Pacific Theatre. My uncle’s ship was sent to the Philippines to load cargo and to bring it back to Seattle. Top secret. One of the sailors dropped a sack and gold spilled out. It was the Philippine Treasury. Most of it was recovered, but some disappeared into pockets.