Cathedral of St Michael and St John a rare example of one of only four 19th century Cathedrals in NSW and is the second Cathedral to be built in the colony. The design of the building is one of only a few prepared by English architect Charles Hansom for use in Australia and notably modelled on St Osburg's Church in Coventry dating from the 1840s. The place is important in demonstrating the principal characteristics of a class of cultural or natural places/environments in New South Wales. The Cathedral of Saints Michael and John is representative example of a mid 19thbcentury Catholic Cathedral which was established during a
Cathedral of St Michael and St John the Cathedral, underpinning and stabilising the Sanctuary arch following removal of the wings from the columns either side, installation of gas pipe work and heaters in accordance with the requirements of the Bathurst Gas Authority. All of these plans were prepared in April 1961. A subsequent set of plans, prepared in May 1962 in conjunction with R. Crooke, Mitchell & Peacock Consulting Engineers, details the new footings beneath the arches supporting the Sanctuary arch, temporary pinning to support the arch and structural details of the arch support beam. The cathedral extensions were consecrated by Bishop Norton on 23 August 1962