The Basilica of the National Shrine of the Assumption of the Blessed Virgin Mary, also called the Baltimore Basilica, was the first Roman Catholic cathedral built in the United States, and was the first major religious building constructed in the nation after the adoption of the U.S. Constitution. As a co-cathedral, it is one of the seats of the Roman Catholic Archdiocese of Baltimore in Baltimore, Maryland. It is considered the masterpiece of Benjamin Henry Latrobe, the "Father of American Architecture".