II, the Supreme Governor of the Church of England. While in Britain he also visited Canterbury Cathedral and knelt in prayer with Robert Runcie, the Archbishop of Canterbury, at the spot where Thomas Becket had been killed, as well as holding several large-scale open air masses, including one at Wembley Stadium, which was attended by some 80,000 people. He travelled to Haiti in 1983, where he spoke in Creole to thousands of impoverished Catholics gathered to greet him at the airport. His message, "things must change in Haiti," referring to the disparity between the wealthy and the poor, was met with thunderous applause. In 2000, he was the first modern pope to visit Egypt, where he met with the Coptic pope, Pope Shenouda III and the Greek Orthodox Patriarch of Alexandria. He was the first Catholic pope to visit and pray in an Islamic mosque, in Damascus, Syria, in 2001. He visited the Umayyad Mosque, a former Christian church where John the Baptist is believed to be interred, where he made a speech calling for Muslims, Christians and Jews to live together. On 15 January 1995, during the X World Youth Day, he offered Mass to an estimated crowd of between five and seven million in Luneta Park, Manila, Philippines, which was considered to be the largest single gathering in Christian history. In March 2000, while visiting Jerusalem, John Paul became the first pope in history to visit and pray at the Western Wall. In September 2001, amid post-11 September concerns, he travelled to Kazakhstan, with an audience largely consisting of Muslims, and to Armenia, to participate in the celebration of 1,700 years of Armenian Christianity. In June 1979, John Paul II travelled to Poland, where ecstatic crowds constantly surrounded him. This first papal trip to Poland uplifted the nation's spirit and sparked the formation of the Solidarity movement in 1980, which later brought freedom and human rights to his troubled homeland. Leaders of the Polish United Workers' Party intended to use the pope's visit to show the people that although the pope was Polish, it did not alter their capacity to govern, oppress, and distribute the goods of society. They also hoped that if the pope abided by the rules they set, the Polish people would see his example and follow them as well. If the pope's visit inspired a riot, the Communist leaders of Poland were prepared to