Before the end of World War II the Catholic Church had a very minor presence in Taiwan, based mainly in the south of the island and centred on Spanish Dominican priests who went there from the Philippines in the 1860s. The end of World War II and the following years saw a mass migration of religious communities from mainland China as Communist persecution began to take effect following the Chinese Communist Revolution in 1949. As a result, the Catholic Church has many Mandarin-speaking mainland immigrants.