 When Isabel Anderson died in 1948, she bequeathed her entire Brookline estate (including mansion, carriage house, and land) to the Town of Brookline.She stipulated in her will that the motorcar collection be known as the "Larz Anderson Collection," and that a non-profit be given stewardship of the collection.The Carriage House which the museum occupies was designed by the Boston architect Edmund M. Wheelwright and completed in 1888.