 Ian Ferrier also designs the Coat of Arms for Catholic Bishops in Queensland, including the Bishop of Cairns, as well as interstate Bishops, universities and municipalities.Bishop Cahill attended the Second Vatican Council, 1961–65, at which the public worship of the Catholic Church was subject to substantial revision after a period of approximately 450 years of rigidity.St Monica's War Memorial Cathedral was designed to reflect materially the changes mandated by the Second Vatican Council's decree on the liturgy, and it is thought that it may be one of the earliest Cathedrals designed in an attempt to reflect these changes.