Christianity is an important part of European life. Therefore, as the main place for the spread of religious activities, churches have a long history and are spread all over urban and rural areas, becoming an important part of the city and town.

The church is a place where the three major schools of Christianity (Catholic, Protestant, Orthodox) hold mass and other religious affairs, classified according to the level of the bishop, cathedral (cathedral), church, chapel, etc.

The first three cathedrals in the world today are Catholic: St. Peter's Cathedral, Milan's Cathedral, and Seville's Cathedral, and there are 1,520 pontifical sanctuaries in the world, most of them in Europe, especially in Italy.

Churches in Europe are divided into four main architectural styles: Romanesque, Gothic, Baroque and Modernist churches, but there are also a few other styles of churches.