A relief knows as "Preservation of Captain Smith by Pocahontas, 1606" is seen above a rotunda door in the U.S. Capitol in Washington, U.S., August 16, 2019. One of the most iconic symbols of American democracy, the U.S. Capitol, was built using enslaved labor who were involved in all aspects of construction, including carpentry, masonry, plastering, glazing and painting. REUTERS/Carlos Barria SEARCH "SLAVERY BUILDINGS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.