At the XVth International Numismatic Congress in Taormina Sicily in September of this year,delegates voted to confirm Warsaw, Poland as the venue for XVIth Congress in 2021. The distinguished numismatist Aleksander Bursche is organizing the XVIth Congress.
Poland has a long history as a middle of numismatic scholarship as summarized by the promotional video presented at the XVth Congress. It is available here and below.
Source: blogspot.com