St. Patrick's Cathedral is a Roman Catholic church located in Melbourne, Australia. It is situated on the eastern edge of the city's central business district, on the corner of Gisborne Street and Cathedral Place. The cathedral is the seat of the Archbishop of Melbourne, currently Peter A. Comensoli, and is dedicated to St. Patrick, the patron saint of Ireland.

The cathedral was designed by William Wardell, a prominent architect who also designed several other important buildings in Melbourne, such as the Treasury Building and the Parliament House. Construction began in 1858, but was interrupted by the gold rush of the 1860s, which caused a shortage of labor and materials. The cathedral was finally completed in 1939, after several more periods of construction and restoration.

The cathedral is built in the Gothic Revival style, with a cruciform floor plan and a central tower. It features several stained glass windows, including one that depicts St. Patrick, and a large rose window at the front of the building. The cathedral's interior is also adorned with a number of sculptures and mosaics, as well as a high altar made of Italian marble.

St. Patrick's Cathedral is open to the public for worship and tours. Visitors can explore the cathedral's interior and learn about its history and significance to Melbourne's Catholic community. The cathedral is also a popular venue for concerts and other cultural events.