The Archdiocese of Boston (Latin: Archidiœcesis Bostoniensis) is a Latin Church ecclesiastical territory, or archdiocese, of the Catholic Church in eastern Massachusetts in the United States. Its mother church is the Cathedral of the Holy Cross in Boston. The archdiocese is the fourth largest in the United States.
The Diocese of Boston was erected in 1808, branching off from the Diocese of Baltimore. It grew rapidly during the 19th century, due to waves of immigrants arriving in the region. Starting in 2002, the archdiocese faced a sexual abuse scandal which touched off investigations of Catholic Church sexual abuse cases throughout the United States.
