Given the question: United States Post Office and Courthouse (Dubuque Iowa 1934) - The United States Post Office and Courthouse Dubuque Iowa is a courthouse of the United States District Court for the Northern District of Iowa located in Dubuque Iowa. Completed in 1934 it was listed in the National Register of Historic Places in 1985 as a contributing resource within the Cathedral Historic District. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
The answer is:
Building