Protestants are split on the issue of whether or not there is a singular true church as Catholics teach, with many Protestants believing in an invisible Church. Lutherans typically see themselves as one branch that was planted by Christ and his Apostles during the Reformation when Catholicism fell away from Jesus' teachings. Different denominations may have subtle theological differences, but they all share a common belief in God. Some Protestant churches are more accepting of other denominations while others question their orthodoxy and the origins of individual beliefs. Because the five solas are the main tenets of the Protestant faith, non-denominational groups and organizations are also considered Protestant.