[1] The Cathedral is constructed of brick that has been covered with lime render and painted ochre to resemble the colour of the original building.

[1] The pro-cathedral of St John the Evangelist is an important building in the history of the Catholic Church in Western Australia.

[2] Even though Brady was to stay in Perth for only a short time (two months) he was able to claim a land grant for the church, on Victoria Avenue.

In 1844 Brady left for Rome to ask for assistance and advocate the establishment of a new diocese for the Swan River Colony.

In 1850, Serra replaced Brady as Bishop of Perth and in 1855 he extended the building in brick to twice its original size.

[1] St John's Pro Cathedral was the principal place of worship for the Roman Catholic community in Perth from 1844 until 1865.

Between 1979 and 1980, work was undertaken to restore the building and remove the additions and alterations, which were unsympathetic to the original design.