After Maurice Frankenhuis’ death, his two grandsons, Joseph and Aaron Oppenheim donated 5000 World War I posters to the Columbia University Rare Books and Manuscript Library in New York in 1974."As a result of the recent donation of the Frankenhuis Poster Collection, Columbia now possesses one of the most important privately held collections of posters and proclamations of the First World War and its immediate aftermath." In 1967, Maurice Frankenhuis commissioned a “Tribute to the Six Million Martyrs” medallion sculpted by renowned American artist Elizabeth N. Weistrop and struck by Medallic Art Co. The medal depicts a Jewish mother grasping her two daughters, the Star of David sewn on their garments. In the background, others are loaded onto a cattle-car transport under Nazi guard to an unknown fate. On the reverse, survival is symbolized by a tree stump with new branches growing forth, and the inscription: “THE FRANKENHUIS COLLECTION 1914 – 1918, 1939 – 1945 DESPITE THE FORCES OF DESTRUCTION MAURICE FRANKENHUIS PAINSTAKINGLY RECORDED THE HISTORY OF TWO WORLD WARS IN HIS COLLECTION”. He presented his medal to institutions, world leaders, individuals and Righteous Gentiles. In 1967, Frankenhuis was one of the founders of A.I.N.A, the American Israel Numismatic Association. He displayed exhibitions of his World War II medals at New York coin shows in 1967 - 1968. The Frankenhuis byline appeared over a series of Coin World articles tracing the history of World War II through tokens and medals. Other features about Karl Goetz and many assorted Adolf Hitler medals issues served as primary sources for such works as Colbert and Hyder's Medallic Portraits of Adolf Hitler. Exhibits of several of his major collections pertaining to World War I were curated during the centennial years 2014 -2018.