On August 27, 1897, a first community of faithful of the Ukrainian Greek Catholic Church established itself in Apóstoles, in the Misiones Province.
In 1908 the first priest of the Byzantine rite arrived from Brazil: Father Clemente Bzhujovski, a religious of the Basilian Order of Saint Josaphat who celebrated his first Divine Liturgy in Argentina on March 21, 1908, in Posadas.
Their church of San Jorge was built in 1919 and was consecrated on 20 June 1920 by the auxiliary bishop of Córdoba Inocencio Dávila.
[3] Soon after, Father Ion Dan came from Rome to give spiritual care of the faithful of the Romanian Greek Catholic Church.
[8] A small group of faithful of the Italian-Albanian Church meets at Luis Guillon, in the Esteban Echeverría Partido of the province of Buenos Aires.
[citation needed] The Russian Catholic mission in Argentina included the Russian Christian Revival Society in Buenos Aires, the publishing house and the same-named newspaper For the Truth!, the Salguero printing house, the Institute of Russian Culture in Buenos Aires, the Parish of Peter and Paul, Guames (Church of the Holy Apostles Peter and Paul: Misión rusa, Güemes 2962), the Transfiguration of Christ Skete, El Castilla–Ba Monteverde, Los Cardales, and the Boarding School of St. Apostle Andrew the First-Called.