What is meant by ‘Church Christianity’ and ‘Biblical Christianity’ and where do they come from? ‘Church and Biblical Christianity’ explains that ‘Church Christianity’ is centred around the institution of the church, whereas for ‘Biblical Christianity’ the scriptures have the equivalent position of authority. Both the Roman Catholic and Eastern Orthodox branches belong to Church Christianity and are the most enduring and extensive types of Christianity having been in existence since the 3rd century. Biblical Christianity can trace its roots to the Protestant Reformation of the 16th century when the Bible became widely accessible. Its sectarian nature and desire to shelter from wider society in order to retain Godly purity limited its growth.