2009 G20 London summit London Summit and to co-ordinate their actions. The meeting was organised at the initiative of German Chancellor Angela Merkel. The leaders agreed that markets, financial institutions and the wide range of financial assets they create, and hedge funds should be subject to appropriate control. In addition, they called for effective sanctions against tax havens. They also agreed to impose sanctions against countries that intend to undermine their work. Finally, they advocated the doubling of funds available to the IMF. Finance ministers and central bankers of the G20 met in Horsham on 14 March 2009 to prepare for the London Summit.
2017 G20 Hamburg summit the city of Hamburg. They included an alternative "Global Solidarity Summit" from 5 to 6 July and a peaceful dance-protest-march "Lieber tanz ich als g20" with between 11,000 and 20,000 people attending on 5 July. Around one thousand performance artists called "1000 Gestalten" covered themselves in grey pigment and slowly walked through the streets like zombies. This performance was done to draw awareness of political apathy. After walking, they all removed their grey clothes. Underneath were colourful clothes that symbolized becoming engaged and awake. On 6 July, protests turned violent when over 160 police were injured in clashes with protestors