Douglas Park is home to a Catholic religious community known as the Missionaries of the Sacred Heart, at Saint Mary's Towers in Douglas Park Drive. The community includes an historic sandstone house that was once the home of famous New South Wales surveyor Sir Thomas Mitchell. The house, first known as Park Hall, was completed in 1845. The Saint Mary's Towers Retreat Centre is also located here, utilising the historic novitiate and junior seminary buildings, and the local Catholic community of Douglas Park and Wilton is based here and uses the historic, timber Sacred Heart Church for their liturgical celebrations. The Missionaries of the Sacred Heart have lived in community here since 1904, and so "the Towers" - as it is affectionately known - has been the focus of the local Catholic (and wider) community for more than 100 years.