It was inaugurated in 1959, but only in 1964 was the building completed according to the original plans.
On November 20, 1965, Pope Paul VI raised it to the dignity of a minor basilica with the apostolic letter Adulescentium patris.
Its dome, in diameter, is the third largest among the churches of Rome, after the dome of the Pantheon and that of the Basilica of St Peter.
Source: parrocchiadonbosco.it