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 being diagnosed with terminal liver cancer. Turkey arrested 12 people in Istanbul on the eve of the G20 summit in Hamburg in July 2017 during the "digital security and information management workshop". They included İdil Eser, the head of Amnesty International Turkey. Activists detained included İlknur Üstün of the Women's Coalition, lawyer Günal Kurşun and Veli Acu of the Human Rights Agenda Association. 63.seven civil society groups that are an integral part of the G20 process. 2017 G20 Hamburg summit The 2017 G20 Hamburg summit was the twelfth meeting of the Group of Twenty (G20), which was held on 7–8