* Catholic Church: The largest Christian church by number of members, the Catholic Church is headed by the Pope and is based in Rome. Catholic doctrine emphasizes the importance of tradition, the Virgin Mary, and the sacraments.
* Eastern Orthodox Church: The Eastern Orthodox Church is the second-largest Christian church, with over 200 million members. It is based in Istanbul and is headed by an ecumenical patriarch. Orthodox doctrine emphasizes the importance of tradition, the sacraments, and the veneration of saints.
* Protestant Churches: Protestant churches are those that emerged from the Protestant Reformation in the 16th century. There are many different Protestant denominations, including Lutheranism, Anglicanism, Methodism, and Baptism. Protestant doctrine emphasizes the importance of the Bible and the individual's relationship with God.
* Evangelical Churches: Evangelical churches are those that emphasize the importance of personal conversion and a personal relationship with Jesus Christ. Evangelical churches are often Pentecostal or charismatic in nature, and they often have a strong focus on evangelism and missions.
* Mennonite Churches: Mennonite churches are those that follow the teachings of Menno Simons, a Dutch Anabaptist leader from the 16th century. Mennonites emphasize the importance of peace, non-violence, and simplicity. They often live in close-knit communities and share a common commitment to social justice and service.
Non-Christian Churches
* Jewish Synagogues: Synagogues are the places of worship for Jews. They are typically used for prayer, study, and social gatherings. Synagogues are often led by a rabbi, who is a religious teacher and leader.
* Mosques: Mosques are the places of worship for Muslims. They are typically used for prayer, study, and social gatherings. Mosques are often led by an imam, who is a religious teacher and leader.
* Hindu Temples: Hindu temples are the places of worship for Hindus. They are typically used for prayer, meditation, and the performance of religious rituals. Hindu temples are often dedicated to a particular deity or deities.
* Buddhist Temples: Buddhist temples are the places of worship for Buddhists. They are typically used for meditation, prayer, and the study of Buddhist teachings. Buddhist temples are often led by a monk or nun.
Other Religious Groups
* Baha'i Faith: The Baha'i Faith is a monotheistic religion that emphasizes the unity of all religions and the equality of all people. The Baha'i Faith is based in Haifa, Israel, and is headed by a universal house of justice.
* Sikhism: Sikhism is a monotheistic religion that originated in the Punjab region of India. Sikhs emphasize the importance of living a truthful life, serving others, and meditating on God. The Sikh religion is based in Amritsar, India, and is headed by a guru.
* Jainism: Jainism is a religion that emphasizes the importance of non-violence, asceticism, and the liberation of the soul from the cycle of rebirth. Jainism is based in India, and is headed by a tirthankara.
New Religious Movements
* Scientology: Scientology is a religion that was founded by L. Ron Hubbard in the early 20th century. Scientologists believe that humans are spiritual beings who have been trapped in a cycle of reincarnation. Scientology is based in Los Angeles, California, and is headed by a board of directors.
* Mormonism: Mormonism is a religion that was founded by Joseph Smith in the early 19th century. Mormons believe that God has revealed himself to prophets throughout history, and that the Book of Mormon is a sacred text that contains the word of God. Mormonism is based in Salt Lake City, Utah, and is headed by a president of the church.
* Jehovah's Witnesses: Jehovah's Witnesses are a Christian religious group that was founded by Charles Taze Russell in the late 19th century. Jehovah's Witnesses believe that the Bible is the only source of truth, and that the end of the world is imminent. Jehovah's Witnesses are based in Brooklyn, New York, and are headed by a governing body of elders.