Fraser Mansion
Built 1890
This property is listed in
The National Registry
of Historic Places
As a national landmark for its
architectural and cultural contributions
to the District of Columbia
This is a beautiful pink granite and brick building designed by architects Joseph Hornblower and James Marshall.
Yes, it has been owned by the Founding Church of Scientology since 1994, and they conducted a significant restoration/renovation.
Historical info and photos: http://househistoryman.blogspot.com/2013/01/fraser-mansion-at-1701-20th-street-nw.html
Wikipedia: https://en.wikipedia.org/wiki/Fraser_Mansion