Rancho Santiago de Santa Ana

[1][2][3][4] The lands encompass present-day Santa Ana, Orange, Villa Park, Anaheim Hills, El Modena, Tustin, Costa Mesa, and a part of Irvine, which was formerly known as Rancho Lomas de Santiago and was titled to one of the Yorbas.

The lands encroached upon the village of Puhú, shared by the Tongva, Acjachemen, Payómkawichum, and Serrano, that had been established long before the arrival of the Spanish.

[9][10] José Antonio Yorba built an elaborate adobe hacienda, El Refugio (the Refuge), located near present-day First and Sullivan Streets in western Santa Ana.

With the Mexican Cession of California to the United States following the Mexican–American War, the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored.

[13] In 1854, the Yorba family sold Rancho Santiago de Santa Ana to José Antonio Andrés Sepúlveda.