Time Line: 2003
- beatification of Blessed Bonifacia Rodriguez Castro
- beatification of Blessed Basil Hopko
- beatification of Blessed María Caridad Brader
- beatification of Blessed Zdenka Schelingová
- beatification of Blessed Eugenia Ravasco
- beatification of Blessed Giacomo Alberione
- beatification of Blessed Giulia Salzano
- beatification of Blessed Juana María Condesa Lluch
- beatification of Blessed Ivan Merz
- beatification of Blessed Juan Nepomuceno Zegrí y Moreno
- beatification of Blessed Ladislao Batthyany-Strattmann
- beatification of Blessed Luigi Maria Monti
- beatification of Blessed Maria Cristina Brando
- beatification of Blessed Maria Domenica Mantovani
- beatification of Blessed María Dolores Rodríguez Sopeña
- beatification of Blessed Mary of Jesus Crucified
- beatification of Blessed Mark of Aviano
- beatification of Blessed Pierre Bonhomme
- beatification of Blessed Rosalie Rendu
- beatification of Blessed Teresa of Calcutta
- beatification of Blessed Valentin Paquay
- canonization of Saint Angela de la Cruz
- canonization of Saint Arnold Janssen
- canonization of Saint Daniel Comboni
- canonization of Saint Genoveva Torres Morales
- canonization of Saint Joseph Freinademetz
- canonization of Saint Józef Sebastian Pelczar
- canonization of Saint Jose Maria Rubio y Peralta
- canonization of Saint Maria de Mattias
- canonization of Saint María Maravillas de Jesús
- canonization of Saint Pedro Poveda Castroverde
- canonization of Saint Urszula Ledóchowska
- canonization of Saint Virginia Centurione Bracelli
- declaration of Blessed Basil Moreau as Venerable
- declaration of Blessed Charles of Austria as Venerable
- declaration of Blessed Clemens August von Galen as Venerable
- declaration of Blessed Eurosia Fabris as Venerable
- declaration of Blessed Eustáquio van Lieshout as Venerable
- declaration of Blessed Florentina Nicol Goni as Venerable
- declaration of Blessed Luigi Monza as Venerable
- declaration of Blessed Luigi Biraghi as Venerable
- declaration of Blessed Luigi Boccardo as Venerable
- declaration of Blessed Maria Maddalena Della Passione as Venerable
- declaration of Blessed Mosè Tovini as Venerable
- declaration of Blessed Maria Teresa of Jesus as Venerable
- declaration of Blessed Pierre Vigne as Venerable
- declaration of Blessed Rita Amada de Jesus as Venerable
- elevation of the archdiocese of Maria Santissima in Astana, Kazakhstan
- elevation of the archdiocese of Palembang, Indonesia
- elevation of the archdiocese of Samarinda, Indonesia
- elevation of the archdiocese of Toliara, Madagascar
- elevation of the diocese of Bauchi, Nigeria
- elevation of the diocese of Santissima Trinità in Almaty, Kazakhstan
- founding of the diocese of Cubao, Philippines
- founding of the diocese of Dindigul, India
- founding of the diocese of Engativá, Colombia
- founding of the diocese of Fontibón, Colombia
- founding of the diocese of Kalookan, Philippines
- founding of the diocese of Kimbe, Papua New Guinea
- founding of the diocese of Mindelo, Cape Verde
- founding of the diocese of Pasig, Philippines
- founding of the diocese of Piedras Negras, Coahuila, Mexico
- founding of the diocese of Port-Gentil, Gabon
- founding of the diocese of Puerto Escondido, Oaxaca, México
- founding of the diocese of Soacha, Colombia
- founding of the diocese of Vélez, Colombia
- founding of the diocese of Valle de Chalco, Mexico
- founding of the apostolic exarchate of Odessa-Krym, Ukraine
- founding of the apostolic exarchate of Serbia e Montenegro, Croatia
- founding of the eparchy of Emdeber, Ethiopia
- founding of the eparchy of Guizeh, Egypt
- founding of the eparchy of Idukki, India
- founding of the eparchy of Muvattupuzha, India
- founding of the military ordinariate of Slovakia
- founding of the prefecture apostolic of Makokou, Gabon
