The Archdiocese of Boston 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. From Wikipedia
