Saint Mary's Cathedral is a prominent Roman Catholic church located in Sydney, Australia. It is known for its stunning Gothic Revival architecture, featuring intricate stained glass windows and tall spires. The cathedral serves as the seat of the Archbishop of Sydney and is a significant place of worship for the local community. Construction of the cathedral began in 1868 and was completed in 1928, making it one of the largest cathedrals in Australia. It is a popular tourist attraction, drawing visitors who come to admire its beauty and learn about its historical significance in the region.