became the first bishop of the new diocese, with Mission Santa Barbara serving as its pro-cathedral. After ceding Alta California to the United States at the close of the Mexican–American War, the government of Mexico objected to a bishop based in the United States having jurisdiction over parishes in Mexican Baja California. The Holy See divided the diocese into American and Mexican sections. On 20 November 1849, with the episcopal residence moved to Monterey, a more central position for the new diocese, the American section became the Diocese of Monterey. The Royal Presidio Chapel in Monterey served as the pro-cathedral of the American diocese. In 1853, Pope Pius IX erected the Metropolitan Archdiocese of San Francisco, taking the territory that now constitutes Nevada, Utah, and much of northern California from the diocese and making the diocese a suffragan thereof. In 1859, the same pope renamed of the diocese to Diocese of Monterey-Los Angeles to recognize the growth of the city of Los Angeles. The bishop moved his principal residence to Los Angeles and used the Mission of Santa Barbara as a pro-cathedral until the Cathedral of Saint Vibiana opened in 1876. On June 1, 1922, Pope Pius XI renamed the diocese again, making it the Diocese of Los Angeles-San Diego, and simultaneously erected a new diocese, named the Diocese of Monterey-Fresno, in what had become northern portion of its territory after the erection of the Archdiocese of San Francisco. This changed the title of Bishop John Joseph Cantwell from Bishop of Monterey-Los Angeles to bishop Los Angeles-San Diego, which then comprised the counties of Imperial, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, and Ventura. On July 11, 1936, the same pope elevated and renamed the diocese as the Metropolitan Archdiocese of Los Angeles, with John Joseph Cantwell becoming the first archbishop of Los Angeles, concurrently erecting the Diocese of San Diego with the territory of Imperial, Riverside, San Bernardino, and San Diego Counties, and designated the new Diocese of San Diego and the Diocese of Monterey-Fresno as suffragan of the new metropolitan see. Pope Paul VI subsequently split each of the three dioceses of the Metropolitan Province of Los Angeles into two. On 6 October 1967, he suppressed the Diocese of Monterey-Fresno and erected the present Diocese of Fresno and the present Diocese of Monterey in California, splitting in the territory of the suppressed diocese between them