Secondary school owes its roots to the Lutheran Church. Cathedral schools, church schools, and monasteries educated the Finns until state schools emerged in the 1870s.
Most Finns, close to 90%, belong to the Lutheran Church, and approximately 1% belongs to the Finnish Orthodox Church.
An Ecclesiastical Act by the Parliament governs the church, and many church members pay an optional church tax to fund the church. Schools teach religious education, mainly within the Lutheran Church, but those with Orthodox affiliations will learn about their Orthodox faith.