The document discusses the origins of California's name from a 16th century Spanish novel about the mythical island of California ruled by Queen Calafia. In 1533, Spanish explorers led by Hernan Cortes landed in what is now California, believing it to be this island. By 1539, it was officially named California after the fictional island. It wasn't until 1540 that the Spanish realized California was actually a peninsula, not an island. The discovery of gold in 1848 at Sutter's Mill sparked the California Gold Rush, greatly increasing the non-native population and leading to California becoming a state in 1850.