IBO Italia was born in Italy in 1957, thanks to Father Angelo Marcandella, a young priest of the Congregation of the Sacred Heart and the son of Italian emigrants in Belgium.
Father Angelo had followed the movement "International Builder Membership" since its creation in 1953 in Europe by another priest, Father Werenfried van Straaten, better known as "Bacon Priest." The Bacon Priest, who some years before founded the "Oostpriesterhulp" or " Church of the Silence" (today known as " Aid to the Church in Need") acquired this nickname for his engagement with poor German refugees of the Second World War who, after having escaped from the blasted cities at the end of the war, crowded together on the borders with Belgium and Holland. In his collecting campaigns, Father Bacon took everything that Flemish housewives could spare; above all bacon (which earn him the lifelong nickname of the "Bacon Priest") that he then gave to the evacuee families.
One Sunday morning, during the Mass, he gave some small holy pictures to the children and told them to hang them on the wall of their houses. Whereupon he saw a little girl crying and he asked her why she was so sad. The little girl replied that hers was one of five families living in a warehouse. Her family was in the centre and so there were not any walls; these words left him bewildered and started off the movement of the "International Builder Memberships".

Thus, Father Bacon decided to build houses for them, with the help of many young people who started to come from all over Europe to support us. Working teams of "white overalls", thanks the donation of thousands of white overalls from a German paint company, overran Europe up to Italy. Their aim was to build houses for who could not afford to buy one.
The first office of IBO Italia was in Cognola di Trento, then Pontenure (PC), Piacenza, Cesate (MI), Casalpusterlengo (LO), Cassana (FE) and now in in centre of Ferrara.
By the time, IBO Italia had become an official association (1968) and a Non-Governmental Organization (1972), when the first cooperation project in Zaire was carried out for the Italian Ministry of Foreign Affairs. In 1974, IBO Italia was one of the founding NGOs of Volontari nel Mondo - FOCSIV (Federation of Christian Organizations for International Volunteer Service), at that time, still FOLM (Federation of Lay Missionary Organizations).
To this day, IBO Italia conducts many projects in Latin America, Africa, Asia and thousands of work camps throughout Europe with the participation of tens of thousands of volunteers.