Los Angeles ( /lɔːs ˈændʒələs/ lawss-AN-jə-ləs;Often known by its initials, LA, and nicknamed the City of Angels, Los Angeles is a world center of business, international trade, entertainment, culture, media, fashion, science, technology, and education. As the home base of Hollywood, it is known as the "Entertainment Capital of the World", leading the world in the creation of motion pictures, television production, video games, and recorded music. The importance of the entertainment business to the city has led many celebrities to call Los Angeles and its surrounding suburbs home. Los Angeles hosted the 1932 and 1984 Summer Olympics. Los Angeles is also home to renowned universities such as the University of Southern California and the University of California, Los Angeles.Los Angeles was founded on September 4, 1781 by Spanish governor Felipe de Neve. It became a part of Mexico in 1821 following the Mexican War of Independence. In 1848, at the end of the Mexican–American War, Los Angeles and the rest of California were purchased as part of the Treaty of Guadalupe Hidalgo, thereby becoming part of the United States. Los Angeles was incorporated as a municipality on April 4, 1850, five months before California achieved statehood.Los Angeles enjoys a Mediterranean climate, with an average of 35 days with measurable precipitation annually.