Watterson House is a Federal rowhouse, located at 224 2nd Street, Southeast, Washington, D.C., on Capitol Hill. It was placed on the National Register of Historic Places on January 17, 1992. It was named for George Watterston, a Librarian of Congress. It was the headquarters of the Cato Institute from 1982 to 1993. It is the headquarters of the National Indian Gaming Association. See also National Register of Historic Places listings in the District of Columbia References External links Houses on the National Register of Historic Places in Washington, D.C. Federal architecture in Washington, D.C. Houses completed in 1802 Capitol Hill