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Roman Catholic Diocese of Oakland
Dioecesis Quercopolitana
Mission San José is the seat of the first parish.
Basic information
Location	Oakland, California, United States
Territory	Counties of Alameda and Contra Costa
Rite	Roman Rite
Patron	Blessed Virgin Mary, St. Francis de Sales
Ecclesiastical province	Archdiocese of San Francisco
Established	January 13, 1962
Cathedral	Cathedral of Christ the Light
Bishop	Bishop of Oakland
Website	Diocese of Oakland
Current leadership
Pope	Benedict XVI
Metropolitan	George Hugh Niederauer Archbishop of San Francisco
Diocesan Bishop	Allen Henry Vigneron Bishop of Oakland

The Roman Catholic Diocese of Oakland (Latin: Dioecesis Quercopolitana) is an ecclesiastical territory or diocese of the Roman Catholic Church in Northern California. The diocese comprises Alameda and Contra Costa Counties in the San Francisco Bay Area. When completed, the Cathedral of Christ the Light with serve as the bishop's seat, replacing the Cathedral of Saint Francis de Sales which was demolished after the Loma Prieta Earthquake of 1989.

Once a part of the Archdiocese of San Francisco, the Diocese of Oakland remains a suffragan of the ecclesiastical province of San Francisco. Its fellow suffragans include the dioceses of Honolulu, Las Vegas, Reno, Sacramento, Salt Lake City, San Jose, Santa Rosa and Stockton.

The patrons of the Diocese of Oakland are the Blessed Virgin Mary and Saint Francis de Sales.

Contents 1 History 2 The Diocese Today 3 Bishops of Oakland 4 High schools 5 Resources

The first known Mass celebrated in the area that is to become the Diocese of Oakland was on March 27, 1772 by Father Juan Crespi on the shores of Lake Merritt. Twenty five years later, Mission San José was established in what is now Fremont, becoming the first parish in the area. Within time, Mission San José became the most prosperous of the California Missions and after secularization by the Mexican government the Mission remained an integral part of area with many of the early pioneer families sharing close ties with the Mission.

In 1820's the Peralta family, landowners of much of what would become Alameda County, built a chapel on the grounds of Rancho San Antonio in present-day Oakland. The chapel was served by priests from the Mission and was called Saint Anthony's chapel.

The area came under episcopal control in 1840 with the establishment of the Diocese of the Two Californias. After the Mexican-American War in 1850, the diocese was split in two with the Diocese of Monterey in California administering the areas under American control. In 1853 Joseph Sadoc Alemany, the Bishop of Monterey, moved his seat to San Francisco and became the first Archbishop of San Francisco. At the time Mission San José was the only parish in the East Bay.

In 1858, Archbishop Alemany sent Father James Croke to establish a parish in Oakland. Fr. Croke founded St. Mary, Immaculate Conception at Eighth and Jefferson Streets.

By the turn of the twentieth century many parishes were formed in Berkeley, Fremont, Livermore, Hayward, Oakland and San Leandro to reflect the growing populations in the East Bay. After World War II rapid growth in the San Francisco region led Pope John XXIII to establish Diocese of Oakland in 1962 from the eastern portion of the San Francisco Archdiocese. Saint Frances de Sales was established as the diocesan mother church and Floyd Begin of Cleveland, Ohio was installed as Oakland's first bishop.

In the following decades the Cathedral of Saint Francis de Sales developed a national reputation for a lively liturgies and social ministries. The cathedral parish was also known for its excellence in music developing was called the "Oakland Cathedral Sound." Unfortunately, the cathedral church suffered damage in the 1989 Loma Prieta earthquake. It is now known as the Saint Mary's-Saint Francis de Sales parish.

The diocese deemed the repairs too costly (estimates were at $8 million for both the Cathedral and Sacred Heart Church) and instead opted to demolish the churches.

In May of 2005, ground was broken for the new $131 million Cathedral of Christ the Light, located on the shores of Lake Merrit in Oakland. The new Cathedral is scheduled to open in 2008 with a new parish formed out of the current cathedral parish of Saint Mary-Saint Francis de Sales.

Today, the Diocese of Oakland serves an estimated 560,000 Catholics in the East Bay region. As the Bay Area is known for a diverse population the diocese celebrates mass in fifteen different languages including Spanish, American Sign Language, Vietnamese, Filipino and Latin (Mass of Paul VI and Tridentine Mass).

The diocesan Department of Catholic Schools administers over forty seven elementary/middle schools and nine high schools serving over 19,000 students. Some of the more notable schools include De La Salle High School, known nationally as a football powerhouse, Bishop O'Dowd High School, and Salesian High School.

In addition to the elementary and high schools, seven Universities and Seminaries are located within Diocese of Oakland, these include:

• Affiliates of the Graduate Theological Union

• • Dominican School of Philosophy and Theology
  • Franciscan School of Theology
  • Jesuit School of Theology at Berkeley
  • The Sabbatical School of Applied Theology

• Holy Names University
• Queen of the Holy Rosary College
• St. Mary's College of California

• The Most Reverend Floyd Lawrence Begin (1962 - 1977)
• The Most Reverend John Stephen Cummins (1977 - 2003)
• The Most Reverend Allen Henry Vigneron (2003 - present)

• Bishop O'Dowd High School, Oakland
• Carondelet High School, Concord
• De La Salle High School, Concord
• Holy Names High School, Oakland Hills
• Moreau Catholic High School
• St. Elizabeth High School, Oakland
• St. Joseph Notre Dame High School, Alameda
• St. Mary's College High School, Berkeley
• Salesian High School, Richmond

• Roman Catholic Archdiocese of San Francisco
• Roman Catholic Diocese of Oakland
• Cathedral of Christ the Light