The Diego Sepulveda Adobe, also known as the Estancia, sits on a bluff overlooking the Santa Ana River bed in Estancia Park. The Segerstrom family purchased the property surrounding the Adobe in 1940. The Segerstrom family recognized the Adobe as an important part of history and donated the land, and the Estancia, to the City of Costa Mesa in 1963. The land and structure was donated to serve as a memorial to the early settlers of the area. The Adobe is the second oldest structure in Orange County and is California Historical Landmark number 227.
From its founding in the early 1800s to its purchase from the Segerstrom family in 1940, the Adobe changed ownership several times. As the Mission Period passed, Spanish land grants were partitioned and the Adobe became property of Don Diego Sepulveda. Next, Gabe Allen, a Los Angelino who fought in the Mexican-American War, acquired it. Allen’s brother occupied the house for the next 16 years. The Allen family passed the Adobe on to the Adams family. The Adobe then served as a meeting post for the American Legion after the First World War.
The Estancia is open to visitors on the first and third Saturdays of each month between noon and 4 p.m. The Historical Society also hosts an annual open house for the community, usually in mid-September. The Estancia can also be scheduled to host an event by contacting the Costa Mesa Recreation Department.
For more information visit their website: http://www.costamesahistory.org/adobe.htm
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