National churches in Rome
Charitable institutions attached to churches in Rome were founded right through the medieval period and included hospitals, hostels and others providing assistance to pilgrims to Rome from a certain "nation", which thus became these nations' national churches in Rome. These institutions were generally organised as confraternities and funded through charity and legacies from rich benefactors belonging to that "nation". Often also they were connected to national "scholae" (ancestors of Rome's seminaries), where the clergymen were trained. The churches and their riches were a sign of the importance of their nation and of the prelates that supported them. Up to 1870 and Italian unification, these national churches also included churches of the Italian city states (now called "regional churches").
A lot of these organizations, lacking a purpose by the 19th century, were expropriated through the 1873 legislation on the suppression of religious corporations. In the following decades, nevertheless, various accords - ending up in the Lateran Pacts - saw the national churches' assets returned to the Roman Catholic Church.
Italian regional churches in Rome
- Abruzzo: Santa Maria Maddalena in Campo Marzio
- Apulia: Basilica di San Nicola in Carcere
- Basilicata: San Nicola in Carcere
- Calabria: San Francesco di Paola ai Monti
- Campania: Santo Spirito dei Napoletani
- Emilia-Romagna: Santi Giovanni Evangelista e Petronio dei Bolognesi
National churches of former Italian territories
- Nice: Santissimo Sudario all'Argentina
- Savoy: Santissimo Sudario all'Argentina
- Giuliano-Dalmata: San Marco Evangelista in Agro Laurentino
- Corsica: San Crisogono (formerly)
- Argentina: Santa Maria Addolorata a piazza Buenos Aires
- Canada: Nostra Signora del Santissimo Sacramento e Santi Martiri Canadesi
- Chile: Santa Maria della Pace
- Ecuador: Santa Maria in Via 
- Mexico: Nostra Signora di Guadalupe e San Filippo Martire
- Peru: Basilica di Sant'Anastasia al Palatino
- United States of America: Santa Susanna alle Terme di Diocleziano
- Church of Santa Maria della Pietà in Camposanto dei Teutonici (in Vatican City)
- Saint Maria dell' Anima (1350-1939)
- Church of Santi Michele e Magno (1992-present) 
- Portugal: Sant'Antonio dei Portoghesi
- Romania: Chiesa di San Salvatore alle Coppelle (Byzantine-Roman rite)
- Russia: Chiesa di Sant'Antonio Abate all'Esquilino
- "Chiesa S. Giovanni della Malva in Trastevere" (in Italian). Roma Multi Etnica.
- "San Giovanni della Malva in Trastevere" (in Italian). Minnistero del'Interno.
- Schmidlin, J. (1913). "College and Church of the Anima (in Rome)". In Herbermann, Charles. Catholic Encyclopedia. New York: Robert Appleton Company.
- Les Pieux Etablissements De La France A Rome Et A Lorette(in French)
- Les églises Française de Rome (Official website)
- Dutch church San Michele dei Frisoni doing a roaring trade
- In Vatican City. Reserved for the Swiss Guards.
- June Hager, "The Armenian Catholic Community in Rome", Inside the Vatican, June 1999
- Raffaella Giuliani, Chiese dei cattolici nel mondo, in AA.VV., Pellegrini a Roma, Comitato Centrale per il Grande Giubileo dell'Anno 2000, Mondadori, 1999
- a cura di Carlo Sabatini, Le chiese nazionali a Roma, Presidenza del Consiglio dei Ministri, Istituto Poligrafico e Zecca dello Stato, Roma, 1979
- L'Italia - 2. Roma, Touring Club Italiano, Milano, 2004