cosign The "Washington" National Cathedralis an episcopal church. Its beauftiful inside, If you are in the dc area go on the tour. The National Cathedral is also the home of two schools The National Cathedral School for Girls and the St. Albans school for Boys. It also took like 80 years to build.
more info at
www.cathedral.org
Also many people confuse the Washington National Cathedral with the Basilica of the National Shrine of the Immacualte Conception also at times called the National Cathedral. The Basilica or Cathedral sits on the campus of the Catholic University of America.
more info at
www.nationalshrineinteractive.com/