 The informative phase of investigation began in Pisa in 1934 and later concluded in 1941 with an apostolic process later being held also in Pisa from 1951 until 1954.Theologians assessed Toniolo's writings to assess if there was an adherence to doctrine and approved them of possessing no doctrinal errors in a decree issued on 1 June 1947.The formal introduction to the cause came under Pope Pius XII on 7 January 1951 in which Toniolo became titled as a Servant of God.