 As Prefect, Roberti headed the Church's highest judicial authority below the Pope himself.He was appointed Titular Archbishop of "Columnata" on 5 April 1962, and received his episcopal consecration on the following 19 April from Pope John, with Cardinals Giuseppe Pizzardo and Benedetto Aloisi Masella serving as co-consecrators, in the Lateran Basilica.He resigned as Titular Archbishop shortly afterwards, on 20 April of that same year.