Folk Catholicism is any of various ethnic expressions of Catholicism as practiced in Catholic communities, typically in developing nations. Practices identified by outside observers as "folk Catholicism" vary from place to place and sometimes contradict the official teachings and practices of the Roman Catholic Church.
Some forms of folk Catholic practices are based on syncretism with non-Catholic beliefs and may involve the syncretism of Catholic saints and non-Christian deities. Some of these folk Catholic forms have come to be identified as separate religions, as is the case with Caribbean and Brazilian syncretisms between Catholicism and West African religions, which include Haitian Vodou, Cuban Santería, and Brazilian Candomblé. Similarly complex syncretisms between Catholic practice and indigenous or Native American belief systems, as are common in Maya communities of Guatemala and Quechua communities of Peru to give just two of many examples, are typically not named as separate religions; their practitioners generally regard themselves as good Catholics even while worshiping non-Christian gods.
Other folk Catholic practices are local elaborations of Catholic custom which do not contradict Catholic doctrine and practice. Examples include compadrazgo in modern Iberia, Latin America and the Philippines, which developed from standard medieval European Catholic practices that fell out of favor in Europe after the seventeenth century; the veneration of saints and angels that are not officially recognized by the Church; and pilgrimages in medieval and modern Europe. Modern folk Catholic beliefs and practices include miracle stories about priests in Ireland, stories about apparitions of the Virgin Mary and other saints in Spain, and folk practices surrounding vows to saints in Latin America and Europe.