The Californias, occasionally known as the Three Californias or the Two Californias, are a region of North America spanning the United States and Mexico, consisting of the U.S. state of California and
Ceremony for the reestablishment of the Commission of the Californias in 2019, San Diego. Pictured are Governor Jaime Bonilla Valdez of Baja California (left), Governor Gavin Newsom of California (center), and Governor Carlos Mendoza Davis of Baja California Sur (right).
Alta California, also known as Nueva California among other names, was a province of New Spain formally established in 1804. Along with the Baja California peninsula, it had previously comprised the p
Misión de Nuestra Señora de Loreto Conchó was the first mission established in the Californias (present-day Loreto, Mexico) in 1697.
Mission San Carlos Borromeo de Carmelo, established in 1770, was the headquarters of the Californian mission system from 1797 until 1833.
Mexico in 1838. From Britannica 7th edition.