Allison Mansion, Arts and Crafts mansion in Indianapolis, United States

Allison Mansion, also known as Riverdale, is a two-story red brick house with a red tile roof on the campus of Marian University in Indianapolis. Built between 1911 and 1914 in the Arts and Crafts style, it includes a sunken conservatory, a porte cochere, and a sunken white marble aviary.

James Allison, co-founder of the Indianapolis Motor Speedway, built this residence between 1911 and 1914 as a private estate. The structure was completed during a period of economic growth in the city and reflects the architectural ideals of the Arts and Crafts movement.

The house is also called Riverdale, a name tied to its estate setting on the Marian University campus. James A. Allison, a businessman and auto racing pioneer, built it as his family home, and it was listed on the National Register of Historic Places in 1970.

The mansion is located on Marian University campus and currently serves as the Office of the President and Events Department. Visitors should check ahead before arriving, as the building remains in active use for administrative and event-related functions.

Allison Mansion is also known as Riverdale, a name it carries alongside its owner's name. The house was listed on the National Register of Historic Places in 1970, and it now stands on the campus of Marian University in Indianapolis.