I will put aside Cohen's bizarre dreams of violence for a moment to address the idea that the memory of Jewish gangsters has been suppressed, which, of course, is not the case.
Jewish gangsters have not been suppressed through Cohen's dreams.
Featured here are ancient jewelry, including a Celtic diadem from the 2nd century b.c. , medieval and Renaissance masterpieces in ivory and enamel, gold and silver, rare church vestments, and medieval weapons.