The Greek Orthodox Archdiocese of America is the principal jurisdiction of the Ecumenical Patriarchate of Constantinople in the United States, overseeing Greek Orthodox parishes, monasteries, and ministries nationwide. It is led by the Archbishop of America and headquartered in Manhattan, adjacent to the Archdiocesan Cathedral of the Holy Trinity. The archdiocese also operates Hellenic College Holy Cross Greek Orthodox School of Theology in Brookline, Massachusetts.