Lot Flannery was an Irish-American sculptor from Washington, D.C., best known for his work in 1868 on the Abraham Lincoln statue located outside the District of Columbia City Hall and the nation's oldest extant memorial to the assassinated president.

District of Columbia City Hall, also known as Old City Hall and the District of Columbia Courthouse, is a historic building at Judiciary Square in downtown Washington, D.C. facing Indiana Avenue. Originally built for the offices of the government of the District of Columbia, the District's courthouse was subsequently used as a Federal courthouse, and was the scene of several notable criminal trials including those of three accused presidential assassins. The building was declared a National Historic Landmark in 1960. It now houses the District of Columbia Court of Appeals.