Auditorium della Conciliazione, also known as Auditorio Pio, is an audience hall and concert hall on the Via della Conciliazione in the Borgo district of Rome. Conceived in the 1930s as part of a vast Mussolini-ordered redevelopment of the district, it was not completed until 1950 after post-World War II work by architects Marcello Piacentini and Giorgio Calza Bini. Surrounding it are wings of the large Palazzo San Pio X, a broadcasting facility also part of the 1930s conception. Both buildings open onto the long perspective from St. Peter's Basilica to the Ponte Sant'Angelo created by the redevelopment.