The Rambouillet Summit in 1975 was attended by the leaders of six countries (France, the United States, the United Kingdom, Germany, Japan, and Italy), with Canada’s head of government participating since the 1976 Puerto Rico Summit and the President of the European Commission of the European Communities (the EC, now the EU) since the London Summit in 1977. Note that following the appointment of a permanent President to the European Council in 2009, Presidents of both the European Commission and the European Council have participated in Summits since the Muskoka Summit in 2010.
After the end of the Cold War, starting from the London Summit in 1991, the President of the Russian Federation began meetings with the G7 leaders after the G7 summit but outside its forum. Since the Naples Summit in 1994, the Russian President began joining political discussions during Summits, and since the Denver Summit in 1997, joined most sessions except a few on global economy and finance. From the Birmingham Summit in 1998, the term G8 Summit was used instead of the traditional G7. Since the Evians Summit in 2003, the Russian leaders began participating in all sessions, including ones on global economy.
However, in response to Russia’s violation of Ukraine’s sovereignty and territorial integrity in March 2014, a decision was made to suspend Russia’s participation in the G8 at an emergency G7 Summit during the Nuclear Security Summit in Hague, Netherlands, held in the same month. Consequently, since 2014, Summits have been convened as the G7 Summit.