Given the question: Willis-Selden Historic District - The Willis-Selden Historic District is a historic district located in Detroit Michigan consisting of three streets: Willis Alexandrine and Selden Running from Woodward Avenue on the east to Third Avenue on the west. The district was listed on the National Register of Historic Places in 1997. 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