Saint Mary's Cathedral

St Mary's Cathedral, Perth, officially the Cathedral of the Immaculate Conception of the Blessed Virgin Mary, is the cathedral church of the Roman Catholic Archdiocese of Perth, and seat of its Archbishop, currently Timothy Costelloe.

The cathedral is at the centre of Victoria Square, on the northern end of Victoria Avenue, Perth, Western Australia. The cathedral as it now stands was constructed in three main phases, with the first phase completed in 1865. Plans were drawn up for the replacement of the cathedral in the 1920s with a larger Perpendicular Gothic edifice. However, construction was interrupted by the onset of the Great Depression, leaving a new transept and sanctuary, with the aisle of the original cathedral as its nave. After being incomplete for 70 years, with portions of the cathedral requiring extensive repair work, funds were eventually raised in the late 1990s and early 2000s for the completion of the expansion. A new curved design for the expansion was created, and featured a second spire and underground parish centre. The cathedral closed for construction in 2006, and reopened in December 2009.

The first Roman Catholic church in the colony was St John's Pro-Cathedral on Victoria Avenue. The colony eventually outgrew this small church, and the local Bishop expressed an interest in constructing a "more worthy Cathedral".

Winship, John A. (2010). Our Cathedral : a history of St Mary's Cathedral, Perth, Western Australia (paperback). Perth, Western Australia: Archdiocese of Perth. p. 240. ISBN 978-1-453-75519-8.