The Piazza Fontana bombing (Italian: Strage di Piazza Fontana) was a terrorist attack that occurred on 12 December 1969 when a bomb exploded at the headquarters of Banca Nazionale dell'Agricoltura (the National Agricultural Bank) in Piazza Fontana (near the Duomo) in Milan, Italy, killing 17 people and wounding 88. The same afternoon, three more bombs were detonated in Rome and Milan, and another was found unexploded. The attack was carried out by the far-right, neo-fascist paramilitary terrorist group Ordine Nuovo and, possibly, certain undetermined collaborators.