Time Line: 2004
- beatification of Blessed Alexandrina Maria da Costa
- beatification of Blessed Anne Catherine Emmerich
- beatification of Blessed Alberto Marvelli
- beatification of Blessed Charles of Austria
- beatification of Blessed Eusebia Palomino Yenes
- beatification of Blessed Giulia Nemesia Valle
- beatification of Blessed Jean Marie Cassant
- beatification of Blessed Luigi Talamoni
- beatification of Blessed Laura of Saint Catherine of Siena
- beatification of Blessed Maria Candida of the Eucharist
- beatification of Blessed Matilde of the Sacred Heart
- beatification of Blessed Pierre Vigne
- beatification of Blessed Piedad de la Cruz Ortiz Real
- canonization of Saint Gianna Beretta Molla
- canonization of Saint Hannibal Mary Di Francia
- canonization of Saint José Manyanet y Vives
- canonization of Saint Luigi Orione
- death of Bishop Francisco José Pérez y Fernández-Golfín
- death of Maria Esperanza Medrano de Bianchini
- declaration of Blessed Augustine Thevarparampil as Venerable
- declaration of Blessed Andrés Solá Molist as Venerable
- declaration of Blessed Antonio Pérez Lários as Venerable
- declaration of Blessed Anacleto González Flores as Venerable
- declaration of Blessed Darío Acosta Zurita as Venerable
- declaration of Blessed Francisco Castells Brenuy as Venerable
- declaration of Blessed Ignatius Klopotowski as Venerable
- declaration of Blessed José Trinidad Rangél Montaño as Venerable
- declaration of Blessed José Boher Foix as Venerable
- declaration of Blessed José Juan Perot Juanmarti as Venerable
- declaration of Blessed José Trinidad Rangel y Montaño as Venerable
- declaration of Blessed Jose Tàpies Sirvant as Venerable
- declaration of Blessed Marianne Cope as Venerable
- declaration of Blessed María De Los Ángeles Ginard Martí as Venerable
- declaration of Blessed Mariano de la Mata Aparicio as Venerable
- declaration of Blessed Maria Grazia Tarallo as Venerable
- declaration of Blessed Maria Louise Merkert as Venerable
- declaration of Blessed Pascual Araguàs Guàrdia as Venerable
- declaration of Blessed Pedro Martret Molet as Venerable
- declaration of Blessed Silvestre Arnau Pascuet as Venerable
- declaration of Julia Navarrete y Guerrero as Venerable
- declaration of Silvio Gallotti as Venerable
- declaration of Vittoria Gisella Gregoris as Venerable
- elevation of the archdiocese of Galveston-Houston, Texas
- elevation of the archdiocese of Raipur, India
- elevation of the archdiocese of Trivandrum, India
- elevation of the archdiocese of Villavicencio, Colombia
- elevation of the diocese of Baguio, Philippines
- elevation of the vicariate apostolic of Brunei, Brunei Darussalam
- establishment of the titular see of Arna
- establishment of the titular see of Biccari
- establishment of the titular see of Carmeiano
- establishment of the titular see of Egnazia Appula
- establishment of the titular see of Erdonia
- establishment of the titular see of Galtelli
- establishment of the titular see of Hirta
- establishment of the titular see of Ostra
- establishment of the titular see of Ottana
- founding of the diocese of Alindao, Central African Republic
- founding of the diocese of Bydgoszcz, Poland
- founding of the diocese of Castanhal, Para, Brazil
- founding of the diocese of Dori, Burkina Faso
- founding of the diocese of Irapuato, Mexico
- founding of the diocese of Sant Feliu de Llobregat, Spain
- founding of the diocese of Swidnica, Poland
- founding of the diocese of Terrassa, Spain
- founding of the diocese of Timika, Indonesia
- founding of the diocese of Uijongbu, South Korea
