I thought this was THE Catholic Church in DC.
http://www.nationalshrine.com/site/c.osJRKVPBJnH/b.4719297/k.BF65/Home.htm
In a sense, yes. But the cathedral for the archdiocese of Washington is St. Mathew’s. The National Shrine of the Immaculate Conception is not under the direct control of the Archdiocese.