Oldfields–Lilly House and Gardens is a 26-acre historic estate and house museum located on the IMA campus, north of the main Museum complex. Lilly House is a 22-room mansion that was once the home of J.K. Lilly Jr., the late Indianapolis businessman, collector and philanthropist. Known historically as Oldfields, the estate features gardens and grounds designed in the 1920s by Percival Gallagher of the famous landscape architecture firm Olmsted Brothers.