Treadwell Mansion and Carriage House

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Treadwell Mansion and Carriage House, is a historic mansion with carriage house built in c. 1875 in the Rockridge neighborhood of Oakland, California, U.S.. The two buildings used to be part of the campus for California College of the Arts, from 1922 until 2022. The Treadwell Mansion and Carriage House has been listed on the National Register of Historic Places since July 15, 1977; listed as a California Historical Landmark since July 15, 1977; and listed as an Oakland Designated Landmark under the name "Treadwell Hall" since August 5, 1975. It is also known as the James Treadwell Mansion, Treadwell Hall, and Macky Hall.