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 (Italian: chiese nazionali).
These institutions were generally organized as confraternities and funded through charity and legacies from rich benefactors belonging to that "nation".
The churches and their riches were a sign of the importance of their nation and of the prelates that supported them.
Many 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 Catholic Church.