2009 G20 London summit a force for good in the medium term." Leaders of the member countries began to prepare for the London Summit months before the effective date, notably with two official meetings dedicated to that preparation, one held in Berlin, Germany, on 22 February 2009 for European leaders, and another in Horsham, Sussex, United Kingdom, on 14 March 2009 for Finance Ministers. Leaders of the four European Union member countries of the G20, the United Kingdom, Germany, France and Italy along with the two largest European non-members, Spain and the Netherlands, met in Berlin on 22 February 2009 to prepare for the
2018 G20 Buenos Aires summit sent messages of support, which were shown at the ceremony. The first G20 meetings of the Argentine Presidency began in Bariloche in early December 2017. They were attended by central bank deputy governors and deputy ministers of finance, as well as the sherpas. During the buildup to the G20 Summit between world leaders on 30 November 2018, Argentina hosted over 45 meetings at various government levels and areas in 11 different cities throughout the country. List of leaders who took part in the 2018 G20 Buenos Aires summit: As the host nation, Argentina invited additional guest countries and international organizations