The L. Ron Hubbard House, also known as the Original Founding Church of Scientology, is a writer's house museum and former Scientology church located at 1812 19th Street NW in the Dupont Circle neighborhood of Washington, D.C., United States. Public tours are given on a regular basis. The operating Founding Church is now located at 1424 16th Street for services, bookstore and classes. After L. Ron Hubbard established Scientology in the 1950s the building housed offices of the Founding Church of Scientology and it is where he performed the first Scientology wedding. Hubbard's personal office was located in the building from 1956 to 1961. In 2022 the building was listed on the National Register of Historic Places (NRHP), a few months after it was added to the District of Columbia Inventory of Historic Sites. The building is also a contributing property to the Dupont Circle Historic District, a neighborhood listed on the NRHP.