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Born in Melbourne, Australia, in 1842, Saint Mary MacKillop co-founded the Sisters of Saint Joseph of the Sacred Heart, becoming Australia's first and only canonised saint. She dedicated her life to improving the lives of the poor and marginalized, establishing schools and orphanages throughout the country. Her unwavering dedication and commitment to social justice made an indelible impact on Australian society, leaving a lasting legacy of compassion, selflessness, and service.