The Smithsonian Castle was built in 1847. The historic structure sits in Washington D.C. and has recently been found to be built by slaves. Some of those slaves were owned by Martha Washington. There’s been a longtime search by historians to know which historic D.C. buildings were built by slaves. Two of the most notable buildings are the U.S. Capitol and the White House.
http://ioneblackamericaweb.files.wordpress.com/2014/12/screen-shot-2014-12-05-at-4-07-18-pm.png?w=180&h=180&crop=1 http://ioneblackamericaweb.files.wordpress.com/2014/12/screen-shot-2014-12-05-at-4-07-46-pm.png?w=180&h=180&crop=1 http://ioneblackamericaweb.files.wordpress.com/2014/12/screen-shot-2014-12-05-at-4-04-54-pm.png?w=180&h=180&crop=1 http://ioneblackamericaweb.files.wordpress.com/2014/12/screen-shot-2014-12-05-at-4-03-13-pm.png?w=180&h=180&crop=1 http://ioneblackamericaweb.files.wordpress.com/2014/12/screen-shot-2014-12-05-at-4-03-43-pm.png?w=180&h=180&crop=1