Ibar, Saint
Iceland
Iconoclasm
Iconography, Christian
Iconium
Iconostasis
Idaho
Idealism
Idolatry
Idumea
Iglesias, Diocese of
Iglesias de la Casa, José
Ignacio de Azevedo, Blessed
Ignatius Loyola, Saint  
Ignatius of Antioch, Saint
Ignatius of Constantinople, Saint
Ignorance
IHS
Illinois
Illinois Indians
Illtyd, Saint
Illuminati
Illyria
Images, Veneration of
Imagination
Imbonati, Carlo Giuseppe
Imhof, Maximus von
Imitation of Christ
Immaculate Conception
Immaculate Conception, Congregation of
Immortality
In Petto
Individualism
Indo-China
Induction
Indulgences
Indulgences, Apostolic
Indult, Pontifical
Ine, Saint
Infallibility
Infamy
Infanticide
Infessura, Stefano
Infidels
Infinity
Infralapsarians
Ingen-Housz, Jan  
Inghirami, Giovanni
Ingleby, Venerable Francis
Ingolstadt, University of
Ingram, Venerable John
Ingres, Jean-Auguste Dominique
Ingulf
Ingworth, Richard of
Injustice
Innocent I, Pope
Innocent II, Pope
Innocent III, Pope  
Innocent IV, Pope
Innocent V, Blessed Pope
Innocent VI, Pope
Innocent VII, Pope
Innocent VIII, Pope
Innocent IX, Pope
Innocent XI, Pope
Innocent XII, Pope
Innocent XIII, Pope
Innsbruck University
Inquisition
Inquisition, Canonical
Insane, Asylums and Care for
Insanity
Inscriptions, Early Christian
Inspiration of the Bible
Installation
Instinct
Institute of Mary
Institute of Mission Helpers of Sacred Heart
Institute of the Blessed Virgin Mary
Institution, Canonical
Intellect
Intendencia Oriental y Llanos de San Martín
Intention
Intercession
Intercession, Episcopal
Interdict
Interest (psychological)
Interest (economic)
Interims
Internuncio
Introduction, to Bible
Introit
Intuition
Inventory of Church Property
Investiture, Canonical
Investitures, Conflict of
Invitatorium
Iona, School of
Ionian Islands
Ionian School of Philosophy
Ionopolis
Iowa
Ipolyi, Arnold
Ippolito Galantini, Blessed
Ipsus
Ireland, Ven. William
Irenaeus, Saint
Irenopolis
Iriarte, Ignacio de
Irish, The, (in countries outside Ireland)
Irish College, in Rome
Irish Colleges, on the Continent
Irish Confessors and Martyrs
Irnerius
Iroquois
Irvingites
Isaac