Catholic Church
The Catholic Church refers to the universal church, or Christian Church. Catholic (from Greek: καθολικός, romanized: katholikos, lit. 'universal') was first used to describe the church in the early 2nd century. The term is used to refer to the unity of the church that surpasses ecclesiastical, linguistic, cultural, and liturgical boundaries, which are constructed by humans. Christians of every background are united to Christ's One Holy Catholic and Apostolic Church by baptism.