The name of California existed as a myth among European explorers before it was discovered. The earliest known mention of the
idea of California was in the 1510 romance novel
Las Sergas de Esplandián by Spanish author
Garci Rodríguez de Montalvo. The book described the
Island of California as being west of the
Indies, "very close to the side of the Terrestrial Paradise; and it is peopled by black women, without any man among them, for they live in the manner of
Amazons". The Baja peninsula was originally believed by the first Spanish sea explorers to be an island, and acquired the name California, after the mythical paradise. Following
Hernán Cortés's
conquest of Mexico, the search for the fabled
Strait of Anián connecting the Atlantic to the Pacific helped motivate him to send several expeditions to the west coast of
New Spain in the 1530s and early 1540s. In 1539, explorer
Francisco de Ulloa proved that Baja California was a peninsula rather than an island, and named the water separating it from the mainland the "Vermillion Sea" (sometimes referred to as the "Red Sea"). The Spaniards gave the name
Las Californias to the peninsula and lands to the north, including both Baja California and
Alta California, the region that became parts of the present-day U.S. states of
California,
Nevada,
Utah,
Arizona, and parts of
Colorado and
Wyoming. Over time the name "Sea of Cortez" replaced Vermillion Sea, and today the term "Gulf of California" is used by some. Although cartographers such as Abraham Ortelius showed the Baja as an extensive peninsula in his
Theatrum Orbis Terrarum, published in
Antwerpen in 1589, and on the map
Maris Pacifici from 1589, in the first half of the 17th century the idea of California as an island spread again; this persisted well into the 18th century, and was included in many erroneous maps that did not have the knowledge of the Spanish sailors about the Pacific coast of North America. It is believed to have originated with Carmelite friar Antonio Ascension, who around 1620 drew a map of California depicting it as an island, supposedly on a misconception of reports by Spanish navigators
Juan de Fuca and Martin d'Aquilar. A copy of this map was sent to Spain and was seized by the Dutch on its way and then reproduced in the Netherlands, and eventually found its way to
Henry Briggs in London who widely disseminated this misinformation. The first printed map showing California as an island was published by Briggs in 1622 (this map was also included in
Hakluytus Posthumus by
Samuel Purchas, 1625), where it was written that it was sometimes supposed to be a peninsula, but had since been shown by the Dutch to be an island. The idea was warmly accepted by cartographers and presented even in c. 1720 on
Carte Nouveelle de la Mer du Sud, published in Amsterdam by Andries and . Garcia and Jorge opined in 2023 that a reason for such a mistake could have originated in the secret in which the Spaniards held their cartography from other European powers' eyes. The final blow to the notion of California as an island was struck by an influential map created by Italian Jesuit priest
Eusebio Kino during his mission in the
Pimería Alta. It was titled
Paso por tierra a la California y sus confinantes nuevas Naciones y Misiones nuevas de la Compañía de JHS [Jesús] en la América Septentrional ("Overland Passage to California and its Contiguous New Nations and New Missions of the Society of Jesus in Northern America"). Originally, in 1695, it depicted California as a peninsula but based on the presence of blue abalone shells (most likely
Haliotis fulgens) from the Pacific coast in the Pimería Alta, the information from natives, and his own travels and sightings, Eusebio Kino redrew the map in 1701. The map was printed in 1707 in
Hamburg and
Leipzig and became one of the best-known maps of northern New Spain. A notable colleague of Eusebio Kino who accompanied him on one of his major travels (in 1694) and acted as the intermediary in the publication of this map and dissemination of Kino's knowledge in Europe was
Carniolan priest .
Timeline • "At the time of contact, Baja California Norte was primarily inhabited by several indigenous groups belonging to the
Yuman language branch of the
Hokan linguistic family." Other indigenous groups in Baja California at the time of first contact include the
Paipai,
Kumeyaay (Kumiai),
Cochimí,
Cucapás (Cocopá),
Kiliwa,
Guaycura (Guaicura or Waicuri), and
Pericú peoples. • 1532:
Hernán Cortés sends three ships north along the coast of Mexico in search of the
Island of California. The three ships disappear without a trace. • 1533: Cortés sends a follow-up mission to search for the lost ships. Pilot
Fortún Ximénez leads a mutiny and founds a settlement in the
Bay of La Paz in today's Baja California before being killed. • 1539: Francisco de Ulloa explores both coasts, confirms the Baja as a peninsula. • 1539: Domingo del Castillo, a cartographer in the Francisco de Ulloa expedition, draws his map with an accurate rendering of the peninsula. • 1622: A map by Michiel Colijn of Amsterdam showed California as a
peninsula rather than an island. Previous maps show the Gulf terminating in its correct location. • 1690s–1800s: Spanish settlement and colonization in lower Las Californias (Baja California peninsula), the first
Spanish missions in Baja California are established by
Jesuit missionaries. • 1701: Explorations by
Eusebio Kino expanded knowledge of the Gulf of California coast. • 1767:
Jesuits expelled;
Franciscans take over the Baja missions. • 1769: Franciscans go with the
Portola expedition to establish new missions in Alta California. Control of the existing Baja missions passes to the
Dominican Order. • 1773:
Francisco Palóu's
line demarcates Franciscan and Dominican areas of mission control. • 1804:
Las Californias divided into Alta ("Upper") and Baja ("Lower") California, using Palóu's line. • 1810–1821:
Mexican War of Independence • 1821:
First Mexican Empire,
Baja California Territory established, covering Baja California peninsula. • 1847: The
Battle of La Paz and the
Siege of La Paz occurs, as well as several other
engagements. • 1848:
Treaty of Guadalupe Hidalgo cedes
Alta California to the United States. As a U.S. territory it receives the
California Gold Rush, causing increased maritime traffic along the peninsula. • 1850:
California admitted to U.S. statehood. • 1853:
William Walker, with 45 men, captures the capital city of
La Paz and declares himself President of the Republic of Lower California. Mexico forces him to retreat a few months later. • 1931: The Territory of Baja California is further divided into Northern and Southern territories (
Territory of Baja California Norte and
Territory of Baja California Sur). • 1952: The North territory becomes the 29th
State of Mexico,
Baja California. The southern portion, below 28°N, remains a federally administered territory. • 1973: The long Trans-Peninsular Highway (
Mexican Federal Highway 1), is finished. It is the first paved road that spans the entire peninsula. The highway was built by the Mexican government to improve Baja California's economy and increase tourism. • 1974: The South territory becomes the 31st State of Mexico,
Baja California Sur. • As of 2000, the five most common indigenous languages in Baja are
Mixteco,
Zapoteco,
Náhuatl,
Purépecha, and
Triqui. ==Geology==