Arlington Cemetery
Arlington National Cemetery Website: Pierre Charles L'enfant
This site from The Arlington National Cemetery contains a biography of L'Enfant (1754-1852) and information about the L'Enfant Monument. You will also find quotes about him, as well as by him. This site also includes several pictures.
Other
Architect of the Capitol: Pierre Charles L'enfant
An oil painting of Pierre Charles L'Enfant (1754-1852) is found here.