Premise: The Gen. Samuel R. Curtis House in Keokuk, Iowa, United States is a Greek Revival structure that was listed on the National Register of Historic Places in 1998. Samuel R. Curtis was an engineer, congressman and served as mayor of Keokuk in the 1850s. He was the hero of the Battle of Pea Ridge during the American Civil War. He was the first Major General from Iowa during the war.
Hypothesis: he Gen. Samuel R. Curtis House  was registered on the National Register of Historic Places in 20th century.