Q:Galena Historic District - The Galena Historic District is a historic district located in the city of Galena Illinois USA. The historic district encompasses 85 percent of the city of Galena and includes more than 800 properties. The downtown area consists of three successive tiers made up of Main Bench and Prospect Streets. Within the boundaries of the district are such notable homes as the Ulysses S. Grant Home and the Elihu B. Washburne House. The Galena Historic District was added to the U.S. 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?
A:
Building