On June 16, 1955 there was an attempted coup d'etat and assassination of President Perón, which resulted in the bombing of Plaza de Mayo and its adjacencies, with the balance of more than 300 civilians killed. In response, Peronist protesters destroyed several churches and there were about 800 imprisonment of political prisoners, including hundreds of priests, such as the bishops Miguel de Andrea and Gustavo Franceschi, 18 and only in the Province of Buenos Aires about one thousand priests were arrested and incommunicado.