sentences:  Lubbers died in Rotterdam on 14 February 2018, at the age of 78, of natural causes.Among the world leaders who offered condolences were former President of the Soviet Union Mikhail Gorbachev, Prime Minister of Russia and former President of Russia Dmitry Medvedev, Chancellor of Germany Angela Merkel, Secretary-General of the United Nations and former Prime Minister of Portugal and United Nations High Commissioner for Refugees António Guterres, United Nations High Commissioner for Refugees Filippo Grandi and President of the European Commission and former Prime Ministers of Luxembourg Jean-Claude Juncker.His ceremonial funeral was held on 20 February 2018 and was attended by Prime Minister Mark Rutte and all living former Prime Ministers Dries van Agt, Wim Kok and Jan Peter Balkenende.