Rand Tower is a 26-story high rise in Minneapolis Minnesota USA that was one of the city's tallest structures when it was completed in 1929. It was designed by Holabird & Root for Rufus R. Rand a World War I aviator who was part of the family that owned the Minneapolis Gas Company (Minnegasco) now part of CenterPoint Energy. Rand had flown in the Lafayette Flying Corps during the war. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Building