The roots of the Centro go back at least to 1948, when the friars began collaborating with the ecumenical magazine “Unitas”, founded by the Jesuit P. Carlo Boyer and based in the convent of St. Brigida in p.zza Farnese in Rome.
Between 1950 and 1960 a collaboration was developed with the Ladies of Bethany and the Foyer Unitas, for the welcoming of Orthodox and Protestant visitors to Rome.
The League provided the Italian translation, the printing and the dissemination of the texts for the “Week of Prayer for the Christian Unity”, which is celebrated every year from 18 to 25 January in the Northern hemisphere.
In 1968 the Friars ceased the English edition of the magazine “Unitas” and founded the Centro Pro Unione, which became a place of meeting, study, research and ecumenical dialogue and formation.
The Centro Pro Unione, to date, has a library specializing in the field of ecumenism, continues its work to promote ecumenical dialogue, through meetings and conferences and by maintaining an up-to-date documentation on the official theological dialogue, and continues to coordinate and disseminate the material useful for the yearly celebration of the “Week of Prayer for Christian Unity”.