Missions 698 History 320 Indians of North America 145 Church history 63 Catholic Church 51 Description and travel 44 Missionaries 43 Theory 43 Discovery and exploration 37 Clergy 21 Spiritual life 21 Missions, Spanish 19 Education 18 Periodicals 17 Spanish mission buildings 17 Christian saints 16 Congresses 16 Religious aspects 16 Wyandot Indians 16 Mission of the church 15 Relations 15 Christianity 14 Protestant churches 13 Sources 13 Evangelistic work 12 Study and teaching 12 African Americans 11 Devotion to 11 Liturgy 11 Missions, American 10 Biblical teaching 9 Catholic authors 9 Controversial literature 9 African American Catholics 8 Biography 8