St Patrick's Marist College Dundas is a systemic Catholic, co-educational high school, located in Dundas, a Greater Western suburb of Sydney, New South Wales, Australia. St Patrick's was founded by the Marist Brothers as a primary school catering for boys on Harrington Street in The Rocks in 1872, leaving it with the distinction of being the oldest school in Australia under the charge of the teaching Marist Brothers, and marking the college as Australia's oldest Catholic school. The school moved to its current site in 1962, and today caters for approximately 940 students from Years 7 to 12. The college is a school of the Diocese of Parramatta, and is a member of the Association of Marist Schools of Australia (AMSA), and the Metropolitan Catholic Schools. Arriving in Sydney on 26 February 1872, the Marist Brothers, led by Brother Ludovic, the founder of the Marist Brothers Province in Australia, established a parish school at St Patrick's, Church Hill. The first St Patrick's was a double storied building in Harrington Street, The Rocks which previously had been St Philip's Anglican School.