Arts center approved for Mel Gibson s former estate in backcountry Greenwich FacebookTwitterEmail 1of12 An artist’s rendering of a proposed learning center on Old Mill Road.Amy Reichert Architecture and DesignShow MoreShow Less 2of12 The property at 124 Old Mill Road in Greenwich on Thursday, Jan. 15, 2015. The 15,862-square-foot house on 75.7 acres was formerly owned by movie star Mel Gibson.File / Tyler Sizemore / Hearst Connecticut MediaShow MoreShow Less 3of12 4of12 The property at 124 Old Mill Road in Greenwich on Thursday, Jan. 15, 2015. The 15,862-square-foot house on 75.7 acres was formerly owned by movie star Mel Gibson.File / Tyler Sizemore / Hearst Connecticut MediaShow MoreShow Less