As I do research for an article on great coin collections from around the world, I was looking into the coin collection at the Staatlichen Museen zu Berlin (National Museums in Berlin). The collectioncollection at the Staatliche Museen is well known as being very comprehensive and diverse covering the beginnings of coinage through the coins of today. With over 500,000, it is one of the largest collections in Europe. Staatliche Museen boasts large collections of Greek, Roman, and European coins from the Middle Ages to today. They also have an extensive collection of art medals dating from 1400.
In addition to the coins and medals, the collection also contains an extensive collection of paper currency primarily from Europe and items used as money from all over the world. The non-coin collection includes tools and dies that were used to strike coins in Berlin since the 17th century. The Staatliche Museen online English version of their online catalog can be found here.
Curators and museum staff made an introductory video about the collection. The narration is in German with English subtitles. Maybe it will entice someone to visit the collection and tell me about it!