Weimar Triangle. The "Weimar Triangle" is, loosely, a grouping of France, Germany, and Poland. The group is intended to promote co-operation between the three countries in crisis zones. It exists mostly in the form of summit meetings between the leaders of these three countries, and of their foreign ministers. The most recent summit of leaders occurred in Berlin on 8 February 2022. Previous meetings took place in Warsaw (2011), Pozna??, Poland (1998), Nancy, France (1999), Hambach, Germany (2001) and Nancy, France (2005). The summits of Foreign Ministers have been more regular, running at least through 2016.