The Dunsmuir mansion, designed by San Francisco architect, J. Eugene Freeman, is an example of Neoclassical-Revival architecture popular in the late 1800s. The 37-room mansion features a Tiffany-style dome, woodpaneled public rooms, 10 fireplaces and inlaid parquet floors within its 16,224 square feet. Servants quarters in the house are designed to accommodate 12 live-in staff.